I read through the comments in the thread, but I'd like some opinions on this:
Production rules allow replacement of the trigger. Got it. However, they also state that all OFM safety devices remain functional. For my M&P, there's the thumb safety, which obviously wouldn't be affected by replacing the trigger, but there's also the "safe action" style safety on the trigger. When I replace the trigger, do the rules require that the aftermarket trigger have the same safety features as OFM, or because it's aftermarket do I get a pass on the absence of similar OFM trigger safety features?
Reason I ask is because the reviews I am reading for the flat face triggers have several complaints that the trigger safety is difficult to disengage depending on how the gun fits the shooter's hand. If I have the option to avoid that issue altogether, I would be more inclined to do that. How have others adapted to flat face triggers, or was it not an issue for you?