FWIW - I have an Advantage Arms Target model conversion kit for my 1911 and it works flawlessly. Like to have the same gun and same trigger action for both 45 and the 22.
Held a Sig and Colt 1911 22 on Friday and of the two, I liked the Colt better. But that's just me. Have read some good things about the GSG. Did fire a Chiapa and the trigger was horrendous.
On the internet, the number of posts do not correlate to actual knowledge.
The notch is supposed to be there as well as the bulge at the front of the frame!
You can't stop insane people from doing insane things by passing insane laws.