Necessity is truely the mother of invention or inovation. I uncovered a glue up process that works very well. It was developed for unclampable pieces, but could be used for other similiar needs. Place a liberal amount of regular yellow carpenters glue on both surfaces—now wait until the glue dehidrates to the point the glue will make long strings when the pieces are placed together. (the glue is darker yellow and a high viscosity) Do not let any part of the glued surfaces dry out keep both sufaces wet coated in glue smeering it around occasionally. When you can pull long strings from both surfaces, press hard and rotate the pieces to squeeze as much glue as possible for a good glue line. You will feel the piece almost pull itself to a stop from the suction at that point stop, wait the recomended time for curing, (before working the joint). Some times you will or might wait a little to long no fret just add a drop of glue from the bottle and press and rotate, this will rehydrate the dehydrated glue. But if it has dried it is too late and the glue should be removed and the surfaces repaired. Refinement—the perfect indication (time to put the joint together is) if you hold the joint at eye level and rapidly place the joint together and pull it apart several times, when it throws tiny floating threads its ready and will only take several seconds to bond.
-- another tip from cooperedpatterns