A friend back in PA is a Glock armorer and he works on several of the local PD duty guns in the area where the LGS he works out of is located. His advice bears repeating; “never make a permanent modification to a Glock, never make more than one modification at a time, save the OEM takeoff parts so that you can replace them if the aftermarket custom parts cause you subsequent reliability problems with the gun”. The best advice, “if you need to make too many modifications then Glocks aren’t the right guns for you to own in the first place”.