I was planning on taking it down about 1/4 of a inch before the barrel starts to arc down into the hinge or about 1/4 inch or so in front of where the roll mark on the side of the barrel starts. Cutting and re-crowning isn't going to be the hard part. The goings will be tough trying to fit a new front sight. I had planned on using a vintage dime but I'm not sure how to attach it. Any suggestions?