Thanks , I have a GPR i built (capper) and I love it. It has never failed and shoots as well as other custom rifles I have. Never heard anyone complain about the barrel on one! I know Flinters are more touchy, so, I will take my time with the build and look at the lock closely to see if there are any issues etc. before I install it. They are a coil spring lock, little to go wrong, other than a poor frizzen hardening or the frizzen does not mate well with the pan or hammer is out of alignment? I have not heard of or seen too many touch holes drilled wrong because they are all done on CNC machines and programmed to be in the correct position etc. Thanks for your feedback. I need all the encouragement I can get! It has been 15 years since I built the last one!