I just set up a new DR BP/W for a single tank and I am wondering if you are supposed to use nut/bolts or bookscrews to hold the wing to the plate. The cylinder straps go through both the wing and the plate but when I have the bolts through the wing and plate, the tank seems to be able to pivot on the two highest points.. the bolt heads. These are the DR "sexbolts" with a pretty low profile. I know the BPW probably doesn't need them to hold the tank in place, but it keeps the wing attached to the plate when the tank isn't on. Any thoughts?