A quick update
I've been using my GSG1911 every time I go to the range, so just wanted to mention a few things:
1. When replacing grips, make sure there's clearance for the left part of Ambi safety to move freely. I put on the S&W rubber grips that one kind soul gave me and these stop the left side from sliding up/down. I don't care since I'm right-handed, but some of you might.
2. I tried dropping the slide into the frame of my STI Trojan. It won't fit because of the large diameter of the guide rod where it rests against the barrel.
3. High-velocity rounds chew up the rubber washer real quick. Those washers will need to be replaced every 500 rounds or so. I found a bunch of washers I had for faucet repair, they seem to work OK. I just punch the center out with an empty .223 brass, slide the washer onto the guide rod, and trim all around with a pair of sharp scissors.
4. I ordered a 'blank slot' from Brownells, to disable the firing pin safety. I want to see if it makes any significant changes to trigger pull.
That's about all, for now. I really enjoy shooting my GSG1911 a lot! Thanks, BlueLine!
P.S. Regarding No.4: just got a message from Brownells that they cannot ship the 'slot filler' part. Called them & was told that's because the factory that makes them is not registered to allow shipping the part outside of US. A $5 POS part, I can't believe it!