22man, your old front sight will probably no longer fit the radius. But, depending on the type you get, screw-on or sweat on, here's how I would do it without the extra tooling, jigs and so forth. With barrel in the receiver, square up the receiver in a padded vise. Use a small C-clamp to hold the front sight while you get it squared and level. Once you have it where you want it silver solder in place. If it's a screw-on you can use an epoxy that will give you enough working time to square up the sight. Once it's dry use the holes in the sight ramp as your drilling jig. With a .22 you could just epoxy in place and leave it at that. George