edge gluing, between not having a really large empty surface to do it on, the multiple pipe clamps, the cauls, the quick clamps, and ... drove me batty Saw this and gambled, it works! 4 Way Pressure Clamp For Clamping Panels https://www.amazon.com/gp/product/B073QSF8JR/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1 Heavy duty steel clamps, and the rest of it is also quality goods.  I spit a 2x4 to use as the cauls and mounted the notched tracks. I put blue