While not a T/C, I picked up a really nice "plains" style 54 cal RB gun with R.E. Davis triggers. Somewhere in its past, before I got it, someone took a file to the sear to make it "better". Well... they didn't and the triggers were very unsafe/unusable. I contacted Davis and sent the triggers in. Davis made them good again, free of charge, and they're back in the rifle working like they should. My point, if you do it yourself, make sure you know what you're doing.