FDPCP, differences between the Gen 1 vs. Gen 2 models ? ? ?

[Paul68]

Not mentioned often. The first gen metal trigger locates the trigger assembly farther back than the second gen assembly. Below shows a 1st gen trigger installed, with a second gen laying on top in what would be its installed position. Since trigger housing position affects striker preload, something to consider perhaps. Also, the first gen allows more forward and rearward movement via a more elongated mounting bolt slot.

[Ribbonstone]

Find you can "wiggle" them back and forth a little bit (something like 1/8th inch) which is a way of slightly changing the stroke.  However, also find that it's probably better to push it all the way forward (short stroke) and use the striker spring adjustment.  Figure sooner or later the trigger unit is going to slip forward, so may as well set it that way from jump to avoid the unpredicatible change.