Beautiful work Stephen! Good info about the copper veneer, wasn't familiar with it, I did make a coffee table about 15 years ago and put a copper top on, for the veneer I used 16oz copper which is much thicker than the veneer, and used contact cement. I hadn't considered the movement of the copper (about a 3'x4' piece) and it has buckled and delaminated in a lot of places. Looks like you have got it figured out though....