If reliability is important, take a quantity of new OEM spare trigger with trigger bars, connectors, firing pin safeties, and firing pins, swapping each until you find the best combo, then let them wear (polish) into each other from there. It doesn't take many of each to find a good combination. Polish at your peril, and all bets are off in the aftermarket. Especially if you introduce new, single components into a system with some wear. Glock fire control component interaction is a little quirkier than most realize. It's not rocket science, but sure as heck not the legos many treat it as.