You did an excellent repair job Kirk. I agree, it does look frail. Judging from the pics it appears very dry and brittle but at least you have the original as reference to make a new one. Recreating the Double Barrel Muzzle-Loading Shotgun devotes a short chapter on stock shaping which may be helpful. The Classic English Double Barrel contains considerable information about how to carve a gun stock to fit the shooter. You may find it helpful too. I'm not familiar enough with the other two you mentioned, aside from knowing the book Professional Stockmaking: Through the Eyes of a Stockmaker is devoted to rifle stocking, to offer any input.
You have a fun project going. Just think, when it's all done you can step back, take a good look at it and say "Yes! I made this."
Hank
