diff --git a/__init__.py b/__init__.py
index f8c2e0a..8c4597f 100644
--- a/__init__.py
+++ b/__init__.py
@@ -4,14 +4,14 @@
 A 3D font helper
 """
 
-import functools
 import importlib
-import io
 import os
 
 import bpy
 from bpy.app.handlers import persistent
-from bpy.types import Panel
+
+from . import addon_updater_ops, bimport, butils
+from .common import Font, utils
 
 bl_info = {
     "name": "ABC3D",
@@ -24,9 +24,6 @@ bl_info = {
 }
 # NOTE: also change version in common/utils.py
 
-from . import addon_updater_ops, bimport, butils
-from .common import Font, utils
-
 # make sure that modules are reloadable
 # when registering
 # handy for development
@@ -127,10 +124,6 @@ class ABC3D_addonPreferences(bpy.types.AddonPreferences):
         layout.label(text="Directory for storage of fonts and other assets:")
         layout.prop(self, "assets_dir")
 
-        # Works best if a column, or even just self.layout.
-        mainrow = layout.row()
-        col = mainrow.column()
-
         # Updater draw function, could also pass in col as third arg.
         addon_updater_ops.update_settings_ui(self, context)
 
@@ -148,7 +141,6 @@ class ABC3D_glyph_properties(bpy.types.PropertyGroup):
         description="Letter Spacing",
     )
 
-
 class ABC3D_text_properties(bpy.types.PropertyGroup):
     def font_items_callback(self, context):
         items = []
@@ -158,7 +150,6 @@ class ABC3D_text_properties(bpy.types.PropertyGroup):
 
     def font_default_callback(self, context):
         d = context.scene.abc3d_data
-        items = self.font_items_callback(context)
         if len(d.available_fonts) > 0:
             if len(d.available_fonts) > d.active_text_index:
                 f = d.available_fonts[d.active_text_index]
@@ -167,7 +158,7 @@ class ABC3D_text_properties(bpy.types.PropertyGroup):
                 f = d.available_fonts[0]
                 return 0  # f"{f.font_name} {f.face_name}"
 
-        if type(self.font_name) != type(None) and type(self.face_name) != type(None):
+        if not isinstance(self.font_name, None) and not isinstance(self.face_name, None):
             return 0  # f"{self.font_name} {self.face_name}"
         else:
             return 0  # ""
@@ -481,7 +472,7 @@ class ABC3D_PT_TextManagement(bpy.types.Panel):
                 for c in t.text_object.children:
                     if (
                         len(c.users_collection) > 0
-                        and (c.get(f"{utils.prefix()}_linked_textobject")) != type(None)
+                        and not isinstance(c.get(f"{utils.prefix()}_linked_textobject"), None)
                         and c.get(f"{utils.prefix()}_linked_textobject") == t.text_id
                     ):
                         remove_me = False