2) When I need to clear off the bench top for laying out the bottom aft skin, I need a place to put the box assembly. I hung it off the back side of the bench where I would not need to be...very often. this seemed to work well with the lh wing, The rh wing will be a bit different because the wint root part of the spar will stick out quite a bit and I may not have enough room to get my fatness around with out do ing damage. But this did work thios time!