I'm working on veneering a large table top,60'' x 108''. Plan was to build it as a torsion box, two ply top and bottom. First glue up two plys, then veneer box, all with a vacuum press. Due to the size and number of pieces on the face I first glued up bottom, quartered Mahogany with poplar perpendicular. It went well, too well as I left it in the vacuum all night,and like to never separated it from the 1/2 melamine cauls.I did get it apart with some dime size pieces torn off. Luckily it's the bottom and I've made decent repairs. Never had melamine stick so bad, thought maybe the new formulation of uni-bond was to blame. Next came the top, 12 piece matched Amboyna burl with outer inlay with Sapele border.Intent not to have the sticking issue occur I glued it up, and broke it apart after glue set, about four hours. It was stuck lightly but separated easily. I left it between melamine cauls overnight. This morning I took it out and I have major separation and bond failure, all over the piece. It's hundreds down the drain. I need to figure out how to proceed from here. I waxed the cauls, yet it was trying to stick, but obviously I took it out to soon. I know if I left it in it would have stuck hard. Is the new formulation to blame, I never had it stick so bad with the old. I considering hammer veneering the next try. This job's a loss as of now, can't afford another mistake.