I notice that the turnbuckle arm on my MZE was cockeyed. and groups were poor. My cable guard had come out. I tried to tighten the screw on the risor with no luck. Just didn' t seem like it would go very tight without stripping something or crushing the rod. Shot a few more times and out comes the rod again. I thought I' d better see what the screw was doing to the rod so I backed it all the way out. Pulled the rod out and it didn' t have a mark on it. Looked inside the hole and could see there was still a set screw in there. Put the rod back in, tightened that inner set screw, problem solved.

I can see why every one takes off those start silencers now. Both of mine are gone after a couple hundred shots.