Okay, I bought a NAP Apache last year and had it mounted. It keeps coming loose and/or falling off no matter how much I tighten and re-check the adjustment levers. I was hitting great with both field tips and BHs and even with a bare shaft out to 30. I finally had enough and put my WB back on... Anyone else have theirs do this, could it have been set up improperly or am I doing something wrong? I am now shooting 4" feathers through a WB... which by the way are holding up remakebly well.