Questor, Obviously you haven't watched the video tapes or read the books you spoke of. The Series 80 parts have absolutely nothing to do with Shaylex's Colt safety problem.
The Colt Series 80 guns are some of the best ever produced. I defy you to feel the difference in my Series 80 SS Commander and any other 1911, other than mine probably has a lighter and crisper pull (3.5 lbs, no creep, very crisp). These are excellent guns and are very sought-after by serious shooters. Yes, they're very accurate too! Like most other guns, the triggers aren't that great out-of-the-box. A few minutes spent on deburring and polishing parts makes them great. My Commander has over 10,000 rounds through it and I can count the malfunctions on one hand, and those were from bad ammo.
FYI, the Series 80 parts are two bellcranks, one on the sear pin, the other on the hammer pin. When the trigger is pulled, the bow of the trigger pushes on the lower bellcrank, in-turn pushes the upper bell crank that pushes a spring loaded firing pin disconnect in the slide. This mechanism prevents the gun from shooting unless the trigger is all the way to the rear. It has nothing to do with the thumb safety function.
I suggest you do your homework before slamming someones gun.