Bookie, I have thought about that allso. I keep coming up with the bit will just follow the original hole. I double checked my measurements before drilling, don't know what happened. I am thinking about going down with the barrel a bit, maybe when my col. virg. lock gets here, I can lay it against the barrel and and see where the main spring will be, and get an idea if I will break through. According to most here it is not a big deal. I am just an amatuer and don't know any better. This is just my 3rd gun from a blank, I seem to have a problem with what is good enough and moving on. I doubt I will ever make a perfect gun. Would still love to come for a visit sometime, you are only probably less than 3 hours away. thanks, chuck