Have an older Kimber stainless classic. Has the original fixed sights. Bought a set of night sights and proceeded to try and change them out. Holy crap!!!!! Apparently they are placed with a 20 ton press. Could not move the front sight without destroying it. Started with a brass punch then tried a generic sight pusher. I would have snapped the front sight post off if I had not stopped. Any ideas how to change these out without sending to a gunsmith or Kimber?