I guess I'll throw in my 2 cents, 1st, dremel the rear sight. I wish I had the time back I spent trying to pound it out. 2 minutes tops with a new cutoff wheel. If you have a small triangular file, use it to put a small lead in on the dovetail notch on the barrel. Makes it easier to get the Krebs rear started. 2nd, center the Krebs sight. You can make your windage adjustments much easier by loosening the two cap screws on the front sight base and moving it. Use a pencil to make a mark on the FSB and a matching one on the barrel. It will give you a reference point to go back to. Make y