NMshooter,
Ill look at their bits again. Im an avid wiodworker and used to do custom shotgun stocks ($2k+). But that was all by hand. What I like about making the stylus, I have access to hundreds of bits and then my friend makes me 2-3 styluses for each them, one dead on size, another 1/16 and 1/8 over sized. Same concept at your quarter coin, but this gives me the extra in all dimensions.
As for glass bedding, may or may not be needed, but Ive done all my LRP rifles and have the bedding stuff by the quart, it really makes a nice snug fit. I just bed the action and float the barrel or air tube.
After I get my Wildcats gussied up, I have a Boyd stock on my Marauder Id like to copy and modify.
M