I just purchased a Springfield Loaded 1911-A1 and need to make a few changes. The pistol has Novak low mount tritium night sites (3-dot) and the rear sight is mounted way left of center causing the gun to print left. Here's the problem, the allen screw is stuck like its been welded in place. I have bent two Allen wrenches but it won't budge. Springfield said sometimes they use blue loctite and that might be the problem. I'm reluctant to heat the screw to free it because of the tritium vials. Any suggestions?