I'm just looking for an easy, down and dirty, working flinter.  I've done the build thing, starting with stock blank and going the whole way on a pre-Revolutionary Lancaster pattern gun, but I'm looking for something a bit more handy to chase Bambi.  Just can't get into inline guns.  No soul.  I'm not put off by Thompson's stocks.  I think they look nice, even if they're not exactly historical.
Thanks for the information on the L & R locks.  I'm not afraid of doing some fine-tuning on the inletting.  I was just wanting the lock plate to fit.  I'm also (obviously) hoping the flashpan will match up properly with the touch hole on Green Mountain barrels.
PC