I just picked up a new Kimber Custom II. It's my first full size 1911. I've got a few questions. How hard is it to swap the grip screw bushings out for slimline bushings? Are they held in with loctite? Kimber and Wilson seem to be the only companies making ambi safeties without the little retainer that hides under the right grip. Are there any others out there and is the wilson worth twice as much? I'm going to the range today and I'll give a report later on. Thanks.