Probably a little more simplistic approach than you’re looking for.
I used a hacksaw with a hose clamp for a guide. Finished the crown with a file and ball stone in a drill.
The group is an after picture. 3” green dot.
I believe the far right hole is my second shot.
I lost about an ounce per...
It’s a factory stock that I modified to have an “appropriate” grip. 😁
I’ve done a couple of them.
https://rokslide.com/forums/threads/ruger-american-vertical-grip.280181/
This is the write up with some pictures. Feel free with questions if you’re interested. I’ll help with what I can.