I'd put the 3.5 connector in first, and go from there. You're not going to find many Factory Trained Glock Armorers, that are going to start polishing and grinding down parts, to smooth stuff out. You're compromising the integrity of the weapon. With the 3.5, and by doing the trigger reset, each time you pull the trigger. You should be happy with that. If you look around the net, you'll find .25 Glock Trigger Jobs. This could help smooth it out, but I can't do this for you. If you would like, I'll take your gun apart, and you're more then welcome to polish those parts. Everyone knows, Glocks triggers aren't that great. You just get used to them. If Glock knew, I was doing that shit, they would pull my certificate. I'm sorry brother, wish I could do more for you.