Please be kind to a newbie. I'm building my first kit, a Chambers Early Virginia. It seems to be a wonderful kit, and I don't think I'll have too much trouble with it. After removing just enough wood at the breech to square up the rounded preinlet corners, I can see that when the lock is installed, the touch hole, when centered in the pan, will be 1/8" in front of the breech plug rather than the recommended 1/16". Will this be an ignition issue? Should I fashion a very thin shim to go behind the barrel and sand flush with the stock? Actually, don't be too nice, tell me bluntly if I'm missing something. Thanks.