I installed/fitted the trigger on my 40P tonight. It doesn't fit directly when straightened. It will hit the bottom of the trigger guard before the trigger will drop the hammer. So I ground off the end of the trigger to allow it to function. I may have taken off too much, but if you go slow and remove small amounts at a time, you can get it to stop right at the trigger break. This would eliminate the need for the over travel set screw.
I don't know how I feel about the shorter trigger but I will take it to the range and test it out.
Given that you would have to refinish the trigger once you get it to fit and function on the frame I don't know if this mod is worth it. You can get a 85C trigger for ~$40. I guess if you want the polished look and strip off the trigger finish and leave it raw.
More to come...
Cheers,
Toby