The stocks were done by lofting. Only 6 profiles, but a lot of trial-and-error fiddling as usual. The thing that gave me most problems was getting everything to fit together correctly.
You said: "It is amazing how few parts go into something like that."
Well, there are ~50 parts ... which isn't all that bad considering that about half of those are screws, pins, and springs. But, yes; the fewer parts, the fewer things to malfunction. Usually.