Lots of insight on things to look for. I'll check his fit. I suspect the LOP is about right. Grip tension may be a player. But, he does have short fat fingers which may be causing him to "choke up" a bit more than most on the grip also. I'll also suggest a tighter shoulder pocket mount. I'll check some dimensions of the trigger guard relationship to the triggers. There's an answer somewhere. I'll get the rubber bumper he asked for also.