Thanks for the ideas everyone. Yeah, it would be a one shot deal, too much wood removal and its final! Lol!! I'm going to contemplate this some more before I act. I don't want to lose any length of pull. It is pretty comfortable as it is now, I just like that curved butt plate better. I had a TC Hawken .50 flintlock about 25 or so years ago, fit my shoulder perfectly. Never should have sold it. I'm thinking this .50 Renegade is a keeper.
I sure miss the now closed Fox Ridge Outfitters in NH, was beside the TC factory. I'm only 1.5 hours away, used to go there often. But a fire, S&W buying TC, everything changes.