After the fact, I noticed an issue. The hammer dropped when the slide was racking and the finger was off of the trigger
. I took it back apart and checked the sear and hammer engagements and found the sear was not completely even accross (using the Sharpie method). I evened it back out and I could not make it repeat that.
I then noticed that when the thumb safety was engaged, the sear was able to move very slightly when the trigger was pulled
So I ordered a new extended thumb safety and a new Nighthawk sear. I did a light cut on the sear like before, checked for proper and even engagement on the hammer and reassembled. Trigger was still like butter and around the same 4 pound trigger pull.
I used some more Youtube videos to figure out how to file down the thumb safety. Not too difficult to understand, but a PITA to get it right. Taking it on and off many many many times.
In the end, this 1911 feels so much more enjoyable to me. The trigger pull is lighter and has no creep. I have an extended thumb safety. I also installed a cheap set of grips...meh....I see why they're cheap. I'll be replacing them with much better ones!