Heath Jamison,
First of all may I congratulate you on your enthusiasm .
Remember you need TWO try guns ! O/U & SxS.
In reality you may well be able to manage all your gunfitting with a gun that has an adjustable comb and the ability to lengthen the stock from about 13" LoP to 16" this fitted with a Jones Pad adjuster ( a luxury item maybe)should cope with all scenario's .
It may be far better to spend your study time learning to understand the intracies of stock fit . Pitch and grip length and radius seem not to be understood.
If you want a MACHINING EXERCISE copy the Holland & Holland try guns with the aluminium machined multiple adjustable angle pistol grip . OR machine a pistol grip with a lockable spherical joint at the wrist of the stock.
