What if any experience has any one had with RIA 1911's . Recently purchased one in the G.I. model in 5",wanted to improve the feel and changed out grip safety with a beaver tail ,skeleton trigger @ 3.5 lbs pull and hammer. They were suppose to be drop in parts from Brownell's needless to say they required a lot of work to fine tune them to work properly. When project started figured would easy install realized I was way over head and beyond my skill level. Took to my gunsmith and he knows if i bring him something to work on it must be a a real job because I usually do my own work except machining. Has anyone had problems with drop in 1911 parts with RIA.