This was sent in by Rick Moore from Local 470. Holy cow, a user submission, almost like a real site!
This is Rigging Math (made simple). By
Delbert L. Hall, Ph.D.
ETCP Certified Rigger
ETCP Recognized Trainer
I have yet to go though it, but it’s too good a resource not to post. And I am not (yet) a rigger. Soon, maybe.