Ok guys I'm looking at increasing my fuel just touch with budget friendly/free mods I'm either gonna drill my factory lb7 rail fittings or replace them with ppe fittings. Question is if I drill them myself is .125 to much cause its the same size as the ppe fittings? I've read somewhere during a ppe twin cp3 install there is a restrictor on the front side of the driver side rail where the ported fitting ties back into that needs to be drilled/ported out so as to allow more flow is there such a resistrictor on the back side of the rail as well just wondering and what material bit is preferred as to make sure the hole is perfectly smooth thanks in advance