what with changing coils here and there along the way, i guess i misplaced or lost the washers that allow you to snug it up. Right now without washers, as much as i can tighten the round knobs, the coil flops around. So some type of rubber or plastic washer right, and put it on the inside or the outside of the two flanges on the coil through which you pass the plastic bolt? thanks all. CO .