Two Triggers,
You could simulate your stock dimensions on a piece of board utilising wooden laths or even string, pinned into place with drawing pins.
Move from the actual dimensions, to the desired drop etc., then see what your pitch angle looks like.
If you use a stock bending jig (as you should) you will be able to maintain the desired cast dimension.
Personally I do feel that American shooters do get bogged down in the pitch department and pay too much attention to pitch and not enough attention to shooting style and gunmount technique.
