diff --git a/manimlib/animation/transform_matching_parts.py b/manimlib/animation/transform_matching_parts.py
index 452333fd..f69f79c1 100644
--- a/manimlib/animation/transform_matching_parts.py
+++ b/manimlib/animation/transform_matching_parts.py
@@ -13,6 +13,8 @@ from manimlib.animation.transform import Transform
 from manimlib.mobject.mobject import Mobject
 from manimlib.mobject.mobject import Group
 from manimlib.mobject.svg.string_mobject import StringMobject
+from manimlib.mobject.svg.tex_mobject import Tex
+from manimlib.mobject.svg.text_mobject import TEXT_MOB_SCALE_FACTOR
 from manimlib.mobject.types.vectorized_mobject import VGroup
 from manimlib.mobject.types.vectorized_mobject import VMobject
 from manimlib.utils.config_ops import digest_config
@@ -26,16 +28,18 @@ if TYPE_CHECKING:
 
 
 class TransformMatchingParts(AnimationGroup):
-    CONFIG = {
-        "mobject_type": Mobject,
-        "group_type": Group,
-        "transform_mismatches": False,
-        "fade_transform_mismatches": False,
-        "key_map": dict(),
-    }
+    mobject_type: type = Mobject
+    group_type: type = Group
 
-    def __init__(self, mobject: Mobject, target_mobject: Mobject, **kwargs):
-        digest_config(self, kwargs)
+    def __init__(
+        self,
+        mobject: Mobject,
+        target_mobject: Mobject,
+        transform_mismatches: bool = False,
+        fade_transform_mismatches: bool = False,
+        key_map: dict = dict(),
+        **kwargs
+    ):
         assert(isinstance(mobject, self.mobject_type))
         assert(isinstance(target_mobject, self.mobject_type))
         source_map = self.get_shape_map(mobject)
@@ -55,7 +59,7 @@ class TransformMatchingParts(AnimationGroup):
         # into another despite not matching by using key_map
         key_mapped_source = self.group_type()
         key_mapped_target = self.group_type()
-        for key1, key2 in self.key_map.items():
+        for key1, key2 in key_map.items():
             if key1 in source_map and key2 in target_map:
                 key_mapped_source.add(source_map[key1])
                 key_mapped_target.add(target_map[key2])
@@ -74,9 +78,9 @@ class TransformMatchingParts(AnimationGroup):
         for key in set(target_map).difference(source_map):
             fade_target.add(target_map[key])
 
-        if self.transform_mismatches:
+        if transform_mismatches:
             anims.append(Transform(fade_source.copy(), fade_target, **kwargs))
-        if self.fade_transform_mismatches:
+        if fade_transform_mismatches:
             anims.append(FadeTransformPieces(fade_source, fade_target, **kwargs))
         else:
             anims.append(FadeOutToPoint(
@@ -119,10 +123,8 @@ class TransformMatchingParts(AnimationGroup):
 
 
 class TransformMatchingShapes(TransformMatchingParts):
-    CONFIG = {
-        "mobject_type": VMobject,
-        "group_type": VGroup,
-    }
+    mobject_type: type = VMobject
+    group_type: type = VGroup
 
     @staticmethod
     def get_mobject_parts(mobject: VMobject) -> list[VMobject]:
@@ -139,10 +141,8 @@ class TransformMatchingShapes(TransformMatchingParts):
 
 
 class TransformMatchingTex(TransformMatchingParts):
-    CONFIG = {
-        "mobject_type": VMobject,
-        "group_type": VGroup,
-    }
+    mobject_type: type = Tex
+    group_type: type = VGroup
 
     @staticmethod
     def get_mobject_parts(mobject: Tex) -> list[SingleStringTex]:
@@ -154,14 +154,11 @@ class TransformMatchingTex(TransformMatchingParts):
 
 
 class TransformMatchingStrings(AnimationGroup):
-    CONFIG = {
-        "key_map": {},
-        "transform_mismatches": False,
-    }
-
     def __init__(self,
         source: StringMobject,
         target: StringMobject,
+        key_map: dict = {},
+        transform_mismatches: bool = False,
         **kwargs
     ):
         digest_config(self, kwargs)
@@ -215,7 +212,7 @@ class TransformMatchingStrings(AnimationGroup):
                     source.get_submob_indices_lists_by_selector(k),
                     target.get_submob_indices_lists_by_selector(v)
                 )
-                for k, v in self.key_map.items()
+                for k, v in key_map.items()
             ]),
             (FadeTransformPieces, get_matched_indices_lists(
                 source.get_specified_part_items(),
@@ -248,15 +245,15 @@ class TransformMatchingStrings(AnimationGroup):
                 source_used_indices.extend(source_used)
                 target_used_indices.extend(target_used)
 
-        rest_source = VGroup(*[
+        rest_source = VGroup(*(
             submob for index, submob in enumerate(source.submobjects)
             if index not in source_used_indices
-        ])
-        rest_target = VGroup(*[
+        ))
+        rest_target = VGroup(*(
             submob for index, submob in enumerate(target.submobjects)
             if index not in target_used_indices
-        ])
-        if self.transform_mismatches:
+        ))
+        if transform_mismatches:
             anims.append(
                 ReplacementTransform(rest_source, rest_target, **kwargs)
             )