I'm planning on putting a beaver tail grip safety on my Colt 1991A1. I've seen a number of different brands out there, Ed Brown, Chip McCormick, Wilson, and others. The biggest concern I have, is do I get a drop in, or one that needs some fitting, hence some cutting and grinding on my frame. I like the smooth blended look of the fitted ones, but then there is the appeal of leaving my gun in tact with the ability to return it to stock. Opinions and photos of what others have used would be greatly appreciated. This is going to be my EDC gun, so form should follow function.