Apparently not all are as gentle with the screws...there have been multiple returns to the factory with stripped threads in the aluminum frame due to over-torquing the screws. I have John's screws but have a similar set that came with the VZ carbon fiber grips, and have been careful not to over-tighten. I, too, use a little Loctite blue and re-tighten as needed after each range session.
Some firearms, like some cars and most women are high maintenance, but worth it. When there are problems, sometimes it's the horse and sometimes it's the rider. So far, for me, it seems that the horse was the problem, but I'm hoping that all will be better. I do love the weight, the feel, the way it sits on my hip at 4 o'clock in a good piece of leather, so I'm going to give her a little slack. The plain Jane R9s that I sold last winter never gave me a minute's trouble...wish I had kept it also.