My wife would be happy to tell you I already went for it. Mostly wilson combat parts, barrel, magazine, compensator bushing, extractor, beavertail safety, hammer, spring kit, trigger and weigand scope mount and a aimshot holographic sight. I'm just waiting for the beavertail installation jig and I can get started fitting all the parts. This is my first 45 and I am really looking forward to tinkering with it. I have already learned one important lesson: drop-in is a relative term.