Really loving this series. Old dogs can learn new tricks with the right teacher.
Just wanted to share a quick note about an issue I ran into, in case others had the same trouble.
When I named my controller and pole target bones, the names got applied to the right side copies instead of the left side (I’m guessing a combination of operator error and because I also still had the mirror on), so when I tried to apply Inverse Kinematics, the armature was trying to link up with the right side bones instead of the ones they were supposed to. Double checking that things were being named as expected fixed the issue for me.
Took me a few tries to see what the issue was