Some Helpful info
i need to make a printed copy of this and keep it in my range bag.
We keep one posted at the club.
I don't like it. It may be good for some, but if an inexperienced shooter tries to use it, they may end up with a self-diagnosies of drooping head, thumbing, and heeling, when their real problem is inconsistent sight picture.
it generally goes by the narrow part of tightening fingers
chart,very helpful and it works,as long as you do everything else right