nub, is the flyer high? The rest may be dropping erratically. If the nock is being pinched; fliers result. Hopefully Ausie will respond. He has an MZE on his. I have the NAP 4000 on mine. No problems at all. Another thing, if the cables or string have stretched, fliers will be a problem until the timing & cam synch are reset. The Duallys really need to be shot off the wall. I pull firmly against it when shooting.