So you don't know what would happen if someone took 10 1911s apart, mixed up the parts and put them together? And you just threw that "good luck" comment out there anyway? Am I getting this right? Have you tried it with Glocks and know it will work, or are you making that up too?
During the transition period for PD switching to Glocks, dept. armorers did just that.
All the G17 parts in piles and put back in the guns without any care except for the right part going in the right place.
I'm curious - isn't military small arms wrenching geared toward "get the guns to go bang and get them out of here".
You state you've never fitted a part in your Army days. Isn't that more a statement of the military mindset of "if parts break or wear we just replace them"? Properly fitted, wouldn't the parts last longer? OK, mil-spec 1911s can work. But at what cost to the parts and their locking surfaces?
Hell, I had to have the thumb safety on one of my (new) Colts fitted just so it didn't feel like mush when operated. Yes, it worked - but it wasn't "right".