Boy does that bring back memories...
I had a bow by a son bowyer, then years later, one from his Dad, also a bowyer. First one the grip shape bit me like others said... took a rasp to it, managed to get a film canister of analine dye to match, from the original bowyer and then redid the riser.
Years later, I tried the Dad. He wouldn't cut the riser to what I asked...so I rasped it to my desired center cut.
Deft to the rescue in both cases...couldn't find mat Deft locally, so I steel-wooled it to knock down the shine.
After I got them to where I was pleased, both being custom and both persons had hearing problems, or wouldn't do as agreed, I just up and sold the bow(s). But not till I beat them at their own game. My Money. My bow.
Finally found a bowyer who truly LISTENED and did all sorts of things to make sure they FITTED the bow to MY hand. Now I'm a happy happy boy!