I bought 2 already squared pieces of poplar sized 1-3/4" x 7" x 22". I ran them trough a jointer just in case and I planed them down to 1-5/8 as I'm going to use them for Jaguar body. I put them together on a flat surface to test the fit and everything looked great. I've just glued them together using 6 clamps and a few minutes later I noticed that they were glued at a very slight angle instead of being in the same plane as they should. I removed the clamps and tried to un-glue the pieces, but it was too late they were glued together rock solid. I put 4 of the 6 clamps on one side trying to compensate for the out-of-plane problem, but this didn't help at all. How can I avoid such issues going forward? Am I over-clamping? Should I clamp some flat wood/metal pieces perpendicular to the glue joint to keep the 2 pieces in the same plane? What is your process of gluing body blanks?