The plans for my Legal Eagle page 22 shows a 5 5/8" piece of plywood cut at 45* degrees. This piece is for the mounting of the wing Spar attach fittings. My question is: Does this piece get put on the aft side? The aft side of spar where the 1/8" plywood is already??Or is there two pieces one on each side? The drawing gives the impression that it is glued on the same side as the 1/8" plywood. The front spar is easy to understand.Thanks!!!!