I have 2 of the Muzzy zero effects for a bow with a cable guard and it is all you would want in a rest. I also have a Muzzy for an Outback with the roller guard and it leaves a lot to be desired. It has some shock when shot, if you let your pinky wander on the shot OUCH[:'(] and the cable attachment makes a slapping noise when shot. The arm that attaches to the cable torques badly when drawn. I e-mailled Muzzy about these issues and the tech I talked to said they were aware of these concerns and they were looking at them. I got the feeling if the rest keeps selling, there won't be much done. I noticed a picture of the rest at an archery store on the net and it looked different. Has anyone purchased one recently that could shed some light on any updates. Don

Since no one seems to be responding, I'll try to help. As far as the main arm hitting your thumb, that is a form problem of sort. I usually see it with people who have a tendency to 'heel' the grip. An extra large thumb would only add to the problem. I would suggest trying to maintain the centerline of the grip on the pad of your thumb. If your 'lifeline' appears anywhere past the left side (for a right-handed shooter) of the grip, you'll probably feel it.

The 'slapping' noise you hear from the cable guard attachment could be caused by something that is loose or out of tolerance. This also could be due to the attachment to the cable being adjusted wrong. If you have the rest stop bottoming well before you get to full draw, the arm will have to torque.

I've really only heard of noise problems a few times and there is usually a good reason for it. It's a shame that you don't live closer so that I could examine your set-up. Good luck.

I have been using the Muzzy rests since they came out on 3 different bows, 2 of them with the roller guard. I just put one on my new Switchback last week. If your threaded rod that attaches to the cable is torquing badly it is NOT set-up properly. That threaded rod should remain straight and should not bend during draw. It sounds like it is not timed properly. The cable connector should be 3.5 inches from the bottom of your roller guard to the center of the screw that connects it to the threaded rod. Once that is set then you time the rest by controlling the length of the threaded rod. Adjusting the length of your threaded rod will eliminate the torquing that you are seeing.

Len, I usually don't get the thumb hanging out but if you get tired and let it wander, it will get hit. I've tried several ways of setting the rest. I adjusted the cable attachment 3.5 inches below the roller guard as instructed in the video. I have played with the rod and still see the torque. The tech at Muzzy said they were aware of these issues. If you have found a fix, I'm sure they would love to hear from you as they said they were trying to come up with a fix. Don

Don:

I analyzed you situation yesterday and was able to come up with a possible cause/effect. If you have the nocking position too low, there is the possibility of the main arm and hook weight 'pulling' the cable out of the roller at the instance of the shot. This will cause a "slapping" of the hook into the back of the riser. This would be more prevalent on a higher poundage/higher speed/lighter arrow application. You can demo this by just pushing the cable forward where the attachment is made. You'll hear a click, which would sound more like a slap at high speed.

There are two possible fixes. First, if you don't want to change your 'tune', install a Sims Mini Limbsaver on the back of the riser so that the 'hook' wouldn't be allowed to move as far. I checked it out and this is a perfect thickness. Second, change your nocking point to make it higher.

As far as the main arm hitting your thumb, Muzzy and I discussed this at length. I was promoting more space but there are reasons why this can't happen. Therefore, if it were mine, I would put a nice radius on the inside of that main arm. If you radius it nicely, it will not affect performance or strength and will relieve your problem.

Hope this helps.

Thanks,Len, I'll try your suggestions. I am getting a bullet hole thru paper but sometimes that mean nothing. Don