Well I went with the G2S, was looking for some more precise feel and a nice break. This trigger was exactly what I was looking for. Also I like the fact the it's not the sensitive that I'm going to get an AD, you need to "pull" that second stage to get the nice break.
One thing I will note is the installation requires a little "tack and feel" along with strong thumbs and fingers. But I did get it. As far as the pins walking out, the trigger pin is held in by the two legs of the hammer spring and the hammer spring pin is held in by a "hook" ring. Seems like they thought that issue thru.
So far so good now to go and shoot it.