It's amazing how critical *trying something* is to understanding it. Reading, watching a tutorial, searching, looking at code or opening a 3d model file... nothing beats entering, experimenting, *trying out the idea* to internalize it.

I kept forgetting how to prevent gimbal lock in terms of rotation order. I kept forgetting what the order *should be* in terms of the "least critical" axis, should it be in the middle, or the last?

It wasn't until I hooked together three toruses and tried making gimbals manually and seeing where the problem happened that I could internalize it.