diff --git a/timm/models/byobnet.py b/timm/models/byobnet.py
index c24ca0e7..1e402629 100644
--- a/timm/models/byobnet.py
+++ b/timm/models/byobnet.py
@@ -1004,9 +1004,10 @@ class BottleneckBlock(nn.Module):
     """ ResNet-like Bottleneck Block - 1x1 - kxk - 1x1
     """
 
-    def __init__(self, in_chs, out_chs, kernel_size=3, stride=1, dilation=(1, 1), bottle_ratio=1., group_size=None,
-                 downsample='avg', attn_last=False, linear_out=False, extra_conv=False, bottle_in=False,
-                 layers: LayerFn = None, drop_block=None, drop_path_rate=0.):
+    def __init__(
+            self, in_chs, out_chs, kernel_size=3, stride=1, dilation=(1, 1), bottle_ratio=1., group_size=None,
+            downsample='avg', attn_last=False, linear_out=False, extra_conv=False, bottle_in=False,
+            layers: LayerFn = None, drop_block=None, drop_path_rate=0.):
         super(BottleneckBlock, self).__init__()
         layers = layers or LayerFn()
         mid_chs = make_divisible((in_chs if bottle_in else out_chs) * bottle_ratio)
@@ -1061,9 +1062,10 @@ class DarkBlock(nn.Module):
     for more optimal compute.
     """
 
-    def __init__(self, in_chs, out_chs, kernel_size=3, stride=1, dilation=(1, 1), bottle_ratio=1.0, group_size=None,
-                 downsample='avg', attn_last=True, linear_out=False, layers: LayerFn = None, drop_block=None,
-                 drop_path_rate=0.):
+    def __init__(
+            self, in_chs, out_chs, kernel_size=3, stride=1, dilation=(1, 1), bottle_ratio=1.0, group_size=None,
+            downsample='avg', attn_last=True, linear_out=False, layers: LayerFn = None, drop_block=None,
+            drop_path_rate=0.):
         super(DarkBlock, self).__init__()
         layers = layers or LayerFn()
         mid_chs = make_divisible(out_chs * bottle_ratio)
@@ -1111,9 +1113,10 @@ class EdgeBlock(nn.Module):
     FIXME is there a more common 3x3 + 1x1 conv block to name this after?
     """
 
-    def __init__(self, in_chs, out_chs, kernel_size=3, stride=1, dilation=(1, 1), bottle_ratio=1.0, group_size=None,
-                 downsample='avg', attn_last=False, linear_out=False, layers: LayerFn = None,
-                 drop_block=None, drop_path_rate=0.):
+    def __init__(
+            self, in_chs, out_chs, kernel_size=3, stride=1, dilation=(1, 1), bottle_ratio=1.0, group_size=None,
+            downsample='avg', attn_last=False, linear_out=False, layers: LayerFn = None,
+            drop_block=None, drop_path_rate=0.):
         super(EdgeBlock, self).__init__()
         layers = layers or LayerFn()
         mid_chs = make_divisible(out_chs * bottle_ratio)
@@ -1158,8 +1161,9 @@ class RepVggBlock(nn.Module):
     This version does not currently support the deploy optimization. It is currently fixed in 'train' mode.
     """
 
-    def __init__(self, in_chs, out_chs, kernel_size=3, stride=1, dilation=(1, 1), bottle_ratio=1.0, group_size=None,
-                 downsample='', layers: LayerFn = None, drop_block=None, drop_path_rate=0.):
+    def __init__(
+            self, in_chs, out_chs, kernel_size=3, stride=1, dilation=(1, 1), bottle_ratio=1.0, group_size=None,
+            downsample='', layers: LayerFn = None, drop_block=None, drop_path_rate=0.):
         super(RepVggBlock, self).__init__()
         layers = layers or LayerFn()
         groups = num_groups(group_size, in_chs)
@@ -1522,7 +1526,7 @@ class ByobNet(nn.Module):
         matcher = dict(
             stem=r'^stem',
             blocks=[
-                (r'^stages\.(\d+)' if coarse else r'^stages\.(\d+).(\d+)', None),
+                (r'^stages\.(\d+)' if coarse else r'^stages\.(\d+)\.(\d+)', None),
                 (r'^final_conv', (99999,))
             ]
         )
diff --git a/timm/models/crossvit.py b/timm/models/crossvit.py
index 5a3260bf..764eb3fe 100644
--- a/timm/models/crossvit.py
+++ b/timm/models/crossvit.py
@@ -164,8 +164,9 @@ class CrossAttention(nn.Module):
 
 class CrossAttentionBlock(nn.Module):
 
-    def __init__(self, dim, num_heads, mlp_ratio=4., qkv_bias=False, qk_scale=None, drop=0., attn_drop=0.,
-                 drop_path=0., act_layer=nn.GELU, norm_layer=nn.LayerNorm):
+    def __init__(
+            self, dim, num_heads, mlp_ratio=4., qkv_bias=False, qk_scale=None, drop=0., attn_drop=0.,
+            drop_path=0., act_layer=nn.GELU, norm_layer=nn.LayerNorm):
         super().__init__()
         self.norm1 = norm_layer(dim)
         self.attn = CrossAttention(
diff --git a/timm/models/cspnet.py b/timm/models/cspnet.py
index 75c525bf..f8a87fab 100644
--- a/timm/models/cspnet.py
+++ b/timm/models/cspnet.py
@@ -157,9 +157,10 @@ class ResBottleneck(nn.Module):
     """ ResNe(X)t Bottleneck Block
     """
 
-    def __init__(self, in_chs, out_chs, dilation=1, bottle_ratio=0.25, groups=1,
-                 act_layer=nn.ReLU, norm_layer=nn.BatchNorm2d, attn_last=False,
-                 attn_layer=None, aa_layer=None, drop_block=None, drop_path=None):
+    def __init__(
+            self, in_chs, out_chs, dilation=1, bottle_ratio=0.25, groups=1,
+            act_layer=nn.ReLU, norm_layer=nn.BatchNorm2d, attn_last=False,
+            attn_layer=None, aa_layer=None, drop_block=None, drop_path=None):
         super(ResBottleneck, self).__init__()
         mid_chs = int(round(out_chs * bottle_ratio))
         ckwargs = dict(act_layer=act_layer, norm_layer=norm_layer)
@@ -199,9 +200,10 @@ class DarkBlock(nn.Module):
     """ DarkNet Block
     """
 
-    def __init__(self, in_chs, out_chs, dilation=1, bottle_ratio=0.5, groups=1,
-                 act_layer=nn.ReLU, norm_layer=nn.BatchNorm2d, attn_layer=None, aa_layer=None,
-                 drop_block=None, drop_path=None):
+    def __init__(
+            self, in_chs, out_chs, dilation=1, bottle_ratio=0.5, groups=1,
+            act_layer=nn.ReLU, norm_layer=nn.BatchNorm2d, attn_layer=None, aa_layer=None,
+            drop_block=None, drop_path=None):
         super(DarkBlock, self).__init__()
         mid_chs = int(round(out_chs * bottle_ratio))
         ckwargs = dict(act_layer=act_layer, norm_layer=norm_layer)
@@ -229,9 +231,10 @@ class DarkBlock(nn.Module):
 
 class CrossStage(nn.Module):
     """Cross Stage."""
-    def __init__(self, in_chs, out_chs, stride, dilation, depth, block_ratio=1., bottle_ratio=1., exp_ratio=1.,
-                 groups=1, first_dilation=None, down_growth=False, cross_linear=False, block_dpr=None,
-                 block_fn=ResBottleneck, **block_kwargs):
+    def __init__(
+            self, in_chs, out_chs, stride, dilation, depth, block_ratio=1., bottle_ratio=1., exp_ratio=1.,
+            groups=1, first_dilation=None, down_growth=False, cross_linear=False, block_dpr=None,
+            block_fn=ResBottleneck, **block_kwargs):
         super(CrossStage, self).__init__()
         first_dilation = first_dilation or dilation
         down_chs = out_chs if down_growth else in_chs  # grow downsample channels to output channels
@@ -280,8 +283,9 @@ class CrossStage(nn.Module):
 class DarkStage(nn.Module):
     """DarkNet stage."""
 
-    def __init__(self, in_chs, out_chs, stride, dilation, depth, block_ratio=1., bottle_ratio=1., groups=1,
-                 first_dilation=None, block_fn=ResBottleneck, block_dpr=None, **block_kwargs):
+    def __init__(
+            self, in_chs, out_chs, stride, dilation, depth, block_ratio=1., bottle_ratio=1., groups=1,
+            first_dilation=None, block_fn=ResBottleneck, block_dpr=None, **block_kwargs):
         super(DarkStage, self).__init__()
         first_dilation = first_dilation or dilation
 
@@ -387,10 +391,10 @@ class CspNet(nn.Module):
     def group_matcher(self, coarse=False):
         matcher = dict(
             stem=r'^stem',
-            blocks=r'^stages.(\d+)' if coarse else [
-                (r'^stages.(\d+).blocks.(\d+)', None),
-                (r'^stages.(\d+).*transition', MATCH_PREV_GROUP),  # map to last block in stage
-                (r'^stages.(\d+)', (0,)),
+            blocks=r'^stages\.(\d+)' if coarse else [
+                (r'^stages\.(\d+)\.blocks\.(\d+)', None),
+                (r'^stages\.(\d+)\..*transition', MATCH_PREV_GROUP),  # map to last block in stage
+                (r'^stages\.(\d+)', (0,)),
             ]
         )
         return matcher
diff --git a/timm/models/deit.py b/timm/models/deit.py
index 3fd8655b..1251c373 100644
--- a/timm/models/deit.py
+++ b/timm/models/deit.py
@@ -85,7 +85,7 @@ class VisionTransformerDistilled(VisionTransformer):
         return dict(
             stem=r'^cls_token|pos_embed|patch_embed|dist_token',
             blocks=[
-                (r'^blocks.(\d+)', None),
+                (r'^blocks\.(\d+)', None),
                 (r'^norm', (99999,))]  # final norm w/ last block
         )
 
diff --git a/timm/models/densenet.py b/timm/models/densenet.py
index 304eda79..a46b86ad 100644
--- a/timm/models/densenet.py
+++ b/timm/models/densenet.py
@@ -45,8 +45,9 @@ default_cfgs = {
 
 
 class DenseLayer(nn.Module):
-    def __init__(self, num_input_features, growth_rate, bn_size, norm_layer=BatchNormAct2d,
-                 drop_rate=0., memory_efficient=False):
+    def __init__(
+            self, num_input_features, growth_rate, bn_size, norm_layer=BatchNormAct2d,
+            drop_rate=0., memory_efficient=False):
         super(DenseLayer, self).__init__()
         self.add_module('norm1', norm_layer(num_input_features)),
         self.add_module('conv1', nn.Conv2d(
@@ -113,8 +114,9 @@ class DenseLayer(nn.Module):
 class DenseBlock(nn.ModuleDict):
     _version = 2
 
-    def __init__(self, num_layers, num_input_features, bn_size, growth_rate, norm_layer=nn.ReLU,
-                 drop_rate=0., memory_efficient=False):
+    def __init__(
+            self, num_layers, num_input_features, bn_size, growth_rate, norm_layer=nn.ReLU,
+            drop_rate=0., memory_efficient=False):
         super(DenseBlock, self).__init__()
         for i in range(num_layers):
             layer = DenseLayer(
@@ -164,8 +166,8 @@ class DenseNet(nn.Module):
 
     def __init__(
             self, growth_rate=32, block_config=(6, 12, 24, 16), num_classes=1000, in_chans=3, global_pool='avg',
-            bn_size=4, stem_type='', norm_layer=BatchNormAct2d, aa_layer=None, drop_rate=0, memory_efficient=False,
-            aa_stem_only=True):
+            bn_size=4, stem_type='', norm_layer=BatchNormAct2d, aa_layer=None, drop_rate=0,
+            memory_efficient=False, aa_stem_only=True):
         self.num_classes = num_classes
         self.drop_rate = drop_rate
         super(DenseNet, self).__init__()
@@ -252,10 +254,10 @@ class DenseNet(nn.Module):
     @torch.jit.ignore
     def group_matcher(self, coarse=False):
         matcher = dict(
-            stem=r'^features.conv[012]|features.norm[012]|features.pool[012]',
-            blocks=r'^features.(?:denseblock|transition)(\d+)' if coarse else [
-                (r'^features.denseblock(\d+).denselayer(\d+)', None),
-                (r'^features.transition(\d+)', MATCH_PREV_GROUP)  # FIXME combine with previous denselayer
+            stem=r'^features\.conv[012]|features\.norm[012]|features\.pool[012]',
+            blocks=r'^features\.(?:denseblock|transition)(\d+)' if coarse else [
+                (r'^features\.denseblock(\d+)\.denselayer(\d+)', None),
+                (r'^features\.transition(\d+)', MATCH_PREV_GROUP)  # FIXME combine with previous denselayer
             ]
         )
         return matcher
diff --git a/timm/models/dla.py b/timm/models/dla.py
index bc1a7394..6ab1802d 100644
--- a/timm/models/dla.py
+++ b/timm/models/dla.py
@@ -323,8 +323,8 @@ class DLA(nn.Module):
             stem=r'^base_layer',
             blocks=r'^level(\d+)' if coarse else [
                 # an unusual arch, this achieves somewhat more granularity without getting super messy
-                (r'^level(\d+).tree(\d+)', None),
-                (r'^level(\d+).root', (2,)),
+                (r'^level(\d+)\.tree(\d+)', None),
+                (r'^level(\d+)\.root', (2,)),
                 (r'^level(\d+)', (1,))
             ]
         )
diff --git a/timm/models/dpn.py b/timm/models/dpn.py
index 616efdbb..95159729 100644
--- a/timm/models/dpn.py
+++ b/timm/models/dpn.py
@@ -243,10 +243,10 @@ class DPN(nn.Module):
     @torch.jit.ignore
     def group_matcher(self, coarse=False):
         matcher = dict(
-            stem=r'^features.conv1',
+            stem=r'^features\.conv1',
             blocks=[
-                (r'^features.conv(\d+)' if coarse else r'^features.conv(\d+)_(\d+)', None),
-                (r'^features.conv5_bn_ac', (99999,))
+                (r'^features\.conv(\d+)' if coarse else r'^features\.conv(\d+)_(\d+)', None),
+                (r'^features\.conv5_bn_ac', (99999,))
             ]
         )
         return matcher
diff --git a/timm/models/efficientnet.py b/timm/models/efficientnet.py
index 96c30c76..0500f76e 100644
--- a/timm/models/efficientnet.py
+++ b/timm/models/efficientnet.py
@@ -518,7 +518,7 @@ class EfficientNet(nn.Module):
         return dict(
             stem=r'^conv_stem|bn1',
             blocks=[
-                (r'^blocks.(\d+)' if coarse else r'^blocks.(\d+).(\d+)', None),
+                (r'^blocks\.(\d+)' if coarse else r'^blocks\.(\d+)\.(\d+)', None),
                 (r'conv_head|bn2', (99999,))
             ]
         )
diff --git a/timm/models/ghostnet.py b/timm/models/ghostnet.py
index bedb04a5..e19af88b 100644
--- a/timm/models/ghostnet.py
+++ b/timm/models/ghostnet.py
@@ -193,7 +193,7 @@ class GhostNet(nn.Module):
         matcher = dict(
             stem=r'^conv_stem|bn1',
             blocks=[
-                (r'^blocks.(\d+)' if coarse else r'^blocks.(\d+).(\d+)', None),
+                (r'^blocks\.(\d+)' if coarse else r'^blocks\.(\d+)\.(\d+)', None),
                 (r'conv_head', (99999,))
             ]
         )
diff --git a/timm/models/gluon_xception.py b/timm/models/gluon_xception.py
index 17a197a0..a9c946b2 100644
--- a/timm/models/gluon_xception.py
+++ b/timm/models/gluon_xception.py
@@ -184,7 +184,7 @@ class Xception65(nn.Module):
         matcher = dict(
             stem=r'^conv[12]|bn[12]',
             blocks=[
-                (r'^mid.block(\d+)', None),
+                (r'^mid\.block(\d+)', None),
                 (r'^block(\d+)', None),
                 (r'^conv[345]|bn[345]', (99,)),
             ],
diff --git a/timm/models/hrnet.py b/timm/models/hrnet.py
index 1a53f44d..7e9b096f 100644
--- a/timm/models/hrnet.py
+++ b/timm/models/hrnet.py
@@ -686,8 +686,8 @@ class HighResolutionNet(nn.Module):
         matcher = dict(
             stem=r'^conv[12]|bn[12]',
             blocks=r'^(?:layer|stage|transition)(\d+)' if coarse else [
-                (r'^layer(\d+).(\d+)', None),
-                (r'^stage(\d+).(\d+)', None),
+                (r'^layer(\d+)\.(\d+)', None),
+                (r'^stage(\d+)\.(\d+)', None),
                 (r'^transition(\d+)', (99999,)),
             ],
         )
diff --git a/timm/models/levit.py b/timm/models/levit.py
index b1dae17a..e93662ae 100644
--- a/timm/models/levit.py
+++ b/timm/models/levit.py
@@ -496,7 +496,7 @@ class Levit(nn.Module):
     def group_matcher(self, coarse=False):
         matcher = dict(
             stem=r'^cls_token|pos_embed|patch_embed',  # stem and embed
-            blocks=[(r'^blocks.(\d+)', None), (r'^norm', (99999,))]
+            blocks=[(r'^blocks\.(\d+)', None), (r'^norm', (99999,))]
         )
         return matcher
 
diff --git a/timm/models/mlp_mixer.py b/timm/models/mlp_mixer.py
index 75cdf84b..ff91def6 100644
--- a/timm/models/mlp_mixer.py
+++ b/timm/models/mlp_mixer.py
@@ -291,7 +291,7 @@ class MlpMixer(nn.Module):
     def group_matcher(self, coarse=False):
         return dict(
             stem=r'^stem',  # stem and embed
-            blocks=[(r'^blocks.(\d+)', None), (r'^norm', (99999,))]
+            blocks=[(r'^blocks\.(\d+)', None), (r'^norm', (99999,))]
         )
 
     @torch.jit.ignore
diff --git a/timm/models/mobilenetv3.py b/timm/models/mobilenetv3.py
index 79e468a0..4a791857 100644
--- a/timm/models/mobilenetv3.py
+++ b/timm/models/mobilenetv3.py
@@ -171,7 +171,7 @@ class MobileNetV3(nn.Module):
     def group_matcher(self, coarse=False):
         return dict(
             stem=r'^conv_stem|bn1',
-            blocks=r'^blocks.(\d+)' if coarse else r'^blocks.(\d+).(\d+)'
+            blocks=r'^blocks\.(\d+)' if coarse else r'^blocks\.(\d+)\.(\d+)'
         )
 
     @torch.jit.ignore
diff --git a/timm/models/nest.py b/timm/models/nest.py
index 655cd755..8692a2b1 100644
--- a/timm/models/nest.py
+++ b/timm/models/nest.py
@@ -334,8 +334,8 @@ class Nest(nn.Module):
         matcher = dict(
             stem=r'^patch_embed',  # stem and embed
             blocks=[
-                (r'^levels.(\d+)' if coarse else r'^levels.(\d+).transformer_encoder.(\d+)', None),
-                (r'^levels.(\d+).(?:pool|pos_embed)', (0,)),
+                (r'^levels\.(\d+)' if coarse else r'^levels\.(\d+)\.transformer_encoder\.(\d+)', None),
+                (r'^levels\.(\d+)\.(?:pool|pos_embed)', (0,)),
                 (r'^norm', (99999,))
             ]
         )
diff --git a/timm/models/nfnet.py b/timm/models/nfnet.py
index 4b79da50..3a45410b 100644
--- a/timm/models/nfnet.py
+++ b/timm/models/nfnet.py
@@ -194,7 +194,6 @@ def _dm_nfnet_cfg(depths, channels=(256, 512, 1536, 1536), act_layer='gelu', ski
     return cfg
 
 
-
 model_cfgs = dict(
     # NFNet-F models w/ GELU compatible with DeepMind weights
     dm_nfnet_f0=_dm_nfnet_cfg(depths=(1, 2, 6, 3)),
@@ -550,7 +549,7 @@ class NormFreeNet(nn.Module):
         matcher = dict(
             stem=r'^stem',
             blocks=[
-                (r'^stages.(\d+)' if coarse else r'^stages.(\d+).(\d+)', None),
+                (r'^stages\.(\d+)' if coarse else r'^stages\.(\d+)\.(\d+)', None),
                 (r'^final_conv', (99999,))
             ]
         )
diff --git a/timm/models/regnet.py b/timm/models/regnet.py
index 4cf4a698..87ea32a6 100644
--- a/timm/models/regnet.py
+++ b/timm/models/regnet.py
@@ -458,7 +458,7 @@ class RegNet(nn.Module):
     def group_matcher(self, coarse=False):
         return dict(
             stem=r'^stem',
-            blocks=r'^stages.(\d+)' if coarse else r'^stages.(\d+).blocks.(\d+)',
+            blocks=r'^stages\.(\d+)' if coarse else r'^stages\.(\d+)\.blocks\.(\d+)',
         )
 
     @torch.jit.ignore
diff --git a/timm/models/resnet.py b/timm/models/resnet.py
index 33366ae7..7a5afb3b 100644
--- a/timm/models/resnet.py
+++ b/timm/models/resnet.py
@@ -315,9 +315,10 @@ def create_aa(aa_layer, channels, stride=2, enable=True):
 class BasicBlock(nn.Module):
     expansion = 1
 
-    def __init__(self, inplanes, planes, stride=1, downsample=None, cardinality=1, base_width=64,
-                 reduce_first=1, dilation=1, first_dilation=None, act_layer=nn.ReLU, norm_layer=nn.BatchNorm2d,
-                 attn_layer=None, aa_layer=None, drop_block=None, drop_path=None):
+    def __init__(
+            self, inplanes, planes, stride=1, downsample=None, cardinality=1, base_width=64,
+            reduce_first=1, dilation=1, first_dilation=None, act_layer=nn.ReLU, norm_layer=nn.BatchNorm2d,
+            attn_layer=None, aa_layer=None, drop_block=None, drop_path=None):
         super(BasicBlock, self).__init__()
 
         assert cardinality == 1, 'BasicBlock only supports cardinality of 1'
@@ -379,9 +380,10 @@ class BasicBlock(nn.Module):
 class Bottleneck(nn.Module):
     expansion = 4
 
-    def __init__(self, inplanes, planes, stride=1, downsample=None, cardinality=1, base_width=64,
-                 reduce_first=1, dilation=1, first_dilation=None, act_layer=nn.ReLU, norm_layer=nn.BatchNorm2d,
-                 attn_layer=None, aa_layer=None, drop_block=None, drop_path=None):
+    def __init__(
+            self, inplanes, planes, stride=1, downsample=None, cardinality=1, base_width=64,
+            reduce_first=1, dilation=1, first_dilation=None, act_layer=nn.ReLU, norm_layer=nn.BatchNorm2d,
+            attn_layer=None, aa_layer=None, drop_block=None, drop_path=None):
         super(Bottleneck, self).__init__()
 
         width = int(math.floor(planes * (base_width / 64)) * cardinality)
@@ -561,48 +563,35 @@ class ResNet(nn.Module):
 
     Parameters
     ----------
-    block : Block
-        Class for the residual block. Options are BasicBlockGl, BottleneckGl.
-    layers : list of int
-        Numbers of layers in each block
-    num_classes : int, default 1000
-        Number of classification classes.
-    in_chans : int, default 3
-        Number of input (color) channels.
-    cardinality : int, default 1
-        Number of convolution groups for 3x3 conv in Bottleneck.
-    base_width : int, default 64
-        Factor determining bottleneck channels. `planes * base_width / 64 * cardinality`
-    stem_width : int, default 64
-        Number of channels in stem convolutions
+    block : Block, class for the residual block. Options are BasicBlockGl, BottleneckGl.
+    layers : list of int, number of layers in each block
+    num_classes : int, default 1000, number of classification classes.
+    in_chans : int, default 3, number of input (color) channels.
+    output_stride : int, default 32, output stride of the network, 32, 16, or 8.
+    global_pool : str, Global pooling type. One of 'avg', 'max', 'avgmax', 'catavgmax'
+    cardinality : int, default 1, number of convolution groups for 3x3 conv in Bottleneck.
+    base_width : int, default 64, factor determining bottleneck channels. `planes * base_width / 64 * cardinality`
+    stem_width : int, default 64, number of channels in stem convolutions
     stem_type : str, default ''
         The type of stem:
           * '', default - a single 7x7 conv with a width of stem_width
           * 'deep' - three 3x3 convolution layers of widths stem_width, stem_width, stem_width * 2
           * 'deep_tiered' - three 3x3 conv layers of widths stem_width//4 * 3, stem_width, stem_width * 2
-    block_reduce_first: int, default 1
-        Reduction factor for first convolution output width of residual blocks,
-        1 for all archs except senets, where 2
-    down_kernel_size: int, default 1
-        Kernel size of residual block downsampling path, 1x1 for most archs, 3x3 for senets
-    avg_down : bool, default False
-        Whether to use average pooling for projection skip connection between stages/downsample.
-    output_stride : int, default 32
-        Set the output stride of the network, 32, 16, or 8. Typically used in segmentation.
+    block_reduce_first : int, default 1
+        Reduction factor for first convolution output width of residual blocks, 1 for all archs except senets, where 2
+    down_kernel_size : int, default 1, kernel size of residual block downsample path, 1x1 for most, 3x3 for senets
+    avg_down : bool, default False, use average pooling for projection skip connection between stages/downsample.
     act_layer : nn.Module, activation layer
     norm_layer : nn.Module, normalization layer
     aa_layer : nn.Module, anti-aliasing layer
-    drop_rate : float, default 0.
-        Dropout probability before classifier, for training
-    global_pool : str, default 'avg'
-        Global pooling type. One of 'avg', 'max', 'avgmax', 'catavgmax'
+    drop_rate : float, default 0. Dropout probability before classifier, for training
     """
 
-    def __init__(self, block, layers, num_classes=1000, in_chans=3,
-                 cardinality=1, base_width=64, stem_width=64, stem_type='', replace_stem_pool=False,
-                 output_stride=32, block_reduce_first=1, down_kernel_size=1, avg_down=False,
-                 act_layer=nn.ReLU, norm_layer=nn.BatchNorm2d, aa_layer=None, drop_rate=0.0, drop_path_rate=0.,
-                 drop_block_rate=0., global_pool='avg', zero_init_last=True, block_args=None):
+    def __init__(
+            self, block, layers, num_classes=1000, in_chans=3, output_stride=32, global_pool='avg',
+            cardinality=1, base_width=64, stem_width=64, stem_type='', replace_stem_pool=False, block_reduce_first=1,
+            down_kernel_size=1, avg_down=False, act_layer=nn.ReLU, norm_layer=nn.BatchNorm2d, aa_layer=None,
+            drop_rate=0.0, drop_path_rate=0., drop_block_rate=0., zero_init_last=True, block_args=None):
         super(ResNet, self).__init__()
         block_args = block_args or dict()
         assert output_stride in (8, 16, 32)
@@ -712,12 +701,15 @@ class ResNet(nn.Module):
             x = self.layer4(x)
         return x
 
-    def forward(self, x):
-        x = self.forward_features(x)
+    def forward_head(self, x, pre_logits: bool = False):
         x = self.global_pool(x)
         if self.drop_rate:
             x = F.dropout(x, p=float(self.drop_rate), training=self.training)
-        x = self.fc(x)
+        return x if pre_logits else self.fc(x)
+
+    def forward(self, x):
+        x = self.forward_features(x)
+        x = self.forward_head(x)
         return x
 
 
diff --git a/timm/models/resnetv2.py b/timm/models/resnetv2.py
index 09b6207a..bde088db 100644
--- a/timm/models/resnetv2.py
+++ b/timm/models/resnetv2.py
@@ -411,8 +411,8 @@ class ResNetV2(nn.Module):
     def group_matcher(self, coarse=False):
         matcher = dict(
             stem=r'^stem',
-            blocks=r'^stages.(\d+)' if coarse else [
-                (r'^stages.(\d+).blocks.(\d+)', None),
+            blocks=r'^stages\.(\d+)' if coarse else [
+                (r'^stages\.(\d+)\.blocks\.(\d+)', None),
                 (r'^norm', (99999,))
             ]
         )
diff --git a/timm/models/rexnet.py b/timm/models/rexnet.py
index 902d344f..33e97222 100644
--- a/timm/models/rexnet.py
+++ b/timm/models/rexnet.py
@@ -173,7 +173,7 @@ class ReXNetV1(nn.Module):
     def group_matcher(self, coarse=False):
         matcher = dict(
             stem=r'^stem',
-            blocks=r'^features.(\d+)',
+            blocks=r'^features\.(\d+)',
         )
         return matcher
 
diff --git a/timm/models/senet.py b/timm/models/senet.py
index 7a7a5e1c..97e592e4 100644
--- a/timm/models/senet.py
+++ b/timm/models/senet.py
@@ -360,7 +360,7 @@ class SENet(nn.Module):
 
     @torch.jit.ignore
     def group_matcher(self, coarse=False):
-        matcher = dict(stem=r'^layer0', blocks=r'^layer(\d+)' if coarse else r'^layer(\d+).(\d+)')
+        matcher = dict(stem=r'^layer0', blocks=r'^layer(\d+)' if coarse else r'^layer(\d+)\.(\d+)')
         return matcher
 
     @torch.jit.ignore
diff --git a/timm/models/swin_transformer.py b/timm/models/swin_transformer.py
index 79d36b65..b8262749 100644
--- a/timm/models/swin_transformer.py
+++ b/timm/models/swin_transformer.py
@@ -525,9 +525,9 @@ class SwinTransformer(nn.Module):
     def group_matcher(self, coarse=False):
         return dict(
             stem=r'^absolute_pos_embed|patch_embed',  # stem and embed
-            blocks=r'^layers.(\d+)' if coarse else [
-                (r'^layers.(\d+).downsample', (0,)),
-                (r'^layers.(\d+).\w+.(\d+)', None),
+            blocks=r'^layers\.(\d+)' if coarse else [
+                (r'^layers\.(\d+).downsample', (0,)),
+                (r'^layers\.(\d+)\.\w+\.(\d+)', None),
                 (r'^norm', (99999,)),
             ]
         )
diff --git a/timm/models/tnt.py b/timm/models/tnt.py
index 63107a27..5b72b196 100644
--- a/timm/models/tnt.py
+++ b/timm/models/tnt.py
@@ -217,7 +217,7 @@ class TNT(nn.Module):
         matcher = dict(
             stem=r'^cls_token|patch_pos|pixel_pos|pixel_embed|norm[12]_proj|proj',  # stem and embed / pos
             blocks=[
-                (r'^blocks.(\d+)', None),
+                (r'^blocks\.(\d+)', None),
                 (r'^norm', (99999,)),
             ]
         )
diff --git a/timm/models/tresnet.py b/timm/models/tresnet.py
index f5a1c99a..0457acf8 100644
--- a/timm/models/tresnet.py
+++ b/timm/models/tresnet.py
@@ -233,7 +233,7 @@ class TResNet(nn.Module):
 
     @torch.jit.ignore
     def group_matcher(self, coarse=False):
-        matcher = dict(stem=r'^body.conv1', blocks=r'^body.layer(\d+)' if coarse else r'^body.layer(\d+).(\d+)')
+        matcher = dict(stem=r'^body\.conv1', blocks=r'^body\.layer(\d+)' if coarse else r'^body\.layer(\d+)\.(\d+)')
         return matcher
 
     @torch.jit.ignore
diff --git a/timm/models/twins.py b/timm/models/twins.py
index c6ca03ff..0626db37 100644
--- a/timm/models/twins.py
+++ b/timm/models/twins.py
@@ -327,11 +327,11 @@ class Twins(nn.Module):
         matcher = dict(
             stem=r'^patch_embeds.0',  # stem and embed
             blocks=[
-                (r'^(?:blocks|patch_embeds|pos_block).(\d+)', None),
+                (r'^(?:blocks|patch_embeds|pos_block)\.(\d+)', None),
                 ('^norm', (99999,))
             ] if coarse else [
-                (r'^blocks.(\d+).(\d+)', None),
-                (r'^(?:patch_embeds|pos_block).(\d+)', (0,)),
+                (r'^blocks\.(\d+)\.(\d+)', None),
+                (r'^(?:patch_embeds|pos_block)\.(\d+)', (0,)),
                 (r'^norm', (99999,))
             ]
         )
diff --git a/timm/models/vgg.py b/timm/models/vgg.py
index f671de22..caf96517 100644
--- a/timm/models/vgg.py
+++ b/timm/models/vgg.py
@@ -136,7 +136,7 @@ class VGG(nn.Module):
     @torch.jit.ignore
     def group_matcher(self, coarse=False):
         # this treats BN layers as separate groups for bn variants, a lot of effort to fix that
-        return dict(stem=r'^features.0', blocks=r'^features.(\d+)')
+        return dict(stem=r'^features\.0', blocks=r'^features\.(\d+)')
 
     @torch.jit.ignore
     def set_grad_checkpointing(self, enable=True):
diff --git a/timm/models/visformer.py b/timm/models/visformer.py
index 112f888b..254a0748 100644
--- a/timm/models/visformer.py
+++ b/timm/models/visformer.py
@@ -271,7 +271,7 @@ class Visformer(nn.Module):
         return dict(
             stem=r'^patch_embed1|pos_embed1|stem',  # stem and embed
             blocks=[
-                (r'^stage(\d+).(\d+)' if coarse else r'^stage(\d+).(\d+)', None),
+                (r'^stage(\d+)\.(\d+)' if coarse else r'^stage(\d+)\.(\d+)', None),
                 (r'^(?:patch_embed|pos_embed)(\d+)', (0,)),
                 (r'^norm', (99999,))
             ]
diff --git a/timm/models/vision_transformer.py b/timm/models/vision_transformer.py
index 1d6e79d8..79778ab1 100644
--- a/timm/models/vision_transformer.py
+++ b/timm/models/vision_transformer.py
@@ -331,7 +331,7 @@ class VisionTransformer(nn.Module):
     def group_matcher(self, coarse=False):
         return dict(
             stem=r'^cls_token|pos_embed|patch_embed',  # stem and embed
-            blocks=[(r'^blocks.(\d+)', None), (r'^norm', (99999,))]
+            blocks=[(r'^blocks\.(\d+)', None), (r'^norm', (99999,))]
         )
 
     @torch.jit.ignore
diff --git a/timm/models/vovnet.py b/timm/models/vovnet.py
index 59ee470f..39d37195 100644
--- a/timm/models/vovnet.py
+++ b/timm/models/vovnet.py
@@ -327,7 +327,7 @@ class VovNet(nn.Module):
     def group_matcher(self, coarse=False):
         return dict(
             stem=r'^stem',
-            blocks=r'^stages.(\d+)' if coarse else r'^stages.(\d+).blocks.(\d+)',
+            blocks=r'^stages\.(\d+)' if coarse else r'^stages\.(\d+).blocks\.(\d+)',
         )
 
     @torch.jit.ignore
diff --git a/timm/models/xception_aligned.py b/timm/models/xception_aligned.py
index 52fe57da..6bbce5e6 100644
--- a/timm/models/xception_aligned.py
+++ b/timm/models/xception_aligned.py
@@ -221,7 +221,7 @@ class XceptionAligned(nn.Module):
     def group_matcher(self, coarse=False):
         return dict(
             stem=r'^stem',
-            blocks=r'^blocks.(\d+)',
+            blocks=r'^blocks\.(\d+)',
         )
 
     @torch.jit.ignore
diff --git a/timm/models/xcit.py b/timm/models/xcit.py
index 7782d721..69b97d64 100644
--- a/timm/models/xcit.py
+++ b/timm/models/xcit.py
@@ -412,8 +412,8 @@ class XCiT(nn.Module):
     def group_matcher(self, coarse=False):
         return dict(
             stem=r'^cls_token|pos_embed|patch_embed',  # stem and embed
-            blocks=r'^blocks.(\d+)',
-            cls_attn_blocks=[(r'^cls_attn_blocks.(\d+)', None), (r'^norm', (99999,))]
+            blocks=r'^blocks\.(\d+)',
+            cls_attn_blocks=[(r'^cls_attn_blocks\.(\d+)', None), (r'^norm', (99999,))]
         )
 
     @torch.jit.ignore