If you glued the beams down with epoxy, you would gain stiffness, but that is not allowed under the F16 rules. If you think the fit of the beams is not too good anymore, re-seating them with thickened epoxy is an option, be careful though and not glue the beams or bolts in permanently <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" />