Well, I'm not innocent either. I changed my plans for my Jagmaster 5 or 6 times before I decided.
I've also changed my plans for my 51 project, but that has been more out of financial concerns than anything else. I knew EXACTLY what I wanted with that, but it's been one compromise after another. Should still turn out pretty cool, though.
Also, how are you going to go about the chambering? I would think it would be an extremly difficult thing to do without messing it up.