Well I took it all apart and tried each piece separately for function and everything was fine until I started screwing down the side plate and I’ve narrowed it down to this screw closest to the rear of the trigger guard. I can tighten it to a point and the cylinder latch starts sticking, back off and it goes away. I couldn’t see any unevenness in the sideplate using my uncalibrated eyeball. Does this change any diagnosis?