Did a few mods to my 36. The biggest issue I had after about 500 rounds with zero malfunctions was my second finger knuckle would get sore. This would even happen when handling the gun, dryfiring etc. Well, I got a little squirrley with the dremel tool. Relax, it broke me out in cold sweat for an hour or two while I contemplated it. Anyway, I gingerly broke the edge at the rear of the trigger guard. Nothing too drastic, still looks factory, but it eliminates the rubbing very efficiently. Secondly, I smoothed over the finger grooves very subtley. The grooves are still there just "softer". I also removed the "lip" from the bottom of the magazine on one of my spares. These mods really improved the grip. I also added an extended mag release, which I shortend a little and removed those sharp grooves and rounded it. Next, I put on a factory extended slide stop. I also smoothed the trigger face so it is like a factory 21 trigger. I have a Heine fixed rear sight and a Hi Viz fiber optic front.