(This is course is awesome. I have done some rigging, ignorantly, for a while. Good organized training makes all the difference.)

I've noticed that I accidentally left Deform enabled on some IK bones, virtually always a bad thing. If I notice  weird behavior I can manually check for/correct some such goofs. IK seems to have quite a few pitfalls.

Based on all I've learned so far, there seem to be a lot of subtle mistakes possible which will mess up a rig (aforementioned IK, double offsets, parenting issues...) Behavior anomalies may be obvious, or not so much. Maybe I am just lazy, but I was wondering if any add-on has a "check rig" function ("lint remover" in programming terms) which flags suspicious items. I suppose one could be programmed. Or as an alternative, is there a good overall manual checklist to run through a rig top-to-bottom? It could be pretty tedious.

Thanks.

Forgive me if I'm mishearing or misunderstanding, but at around 11:48, I though you said you want the x-axis of the shin bone pointing at the knee pole, so you rotate the bone until this is so. But then, as soon as you select it, it snaps so that the shin's x-axis is pointing along the global Y and the knee pole's x-axis pointing along the global Z. Am I mishearing? Or can you break down a little more what is happening here?

Thanks. I'm enjoying the course!