Some pictures of my ported tumult progress so far. Specs are ~4 cubes tuned to ~24hz Pictures My custom veneer press I'm not sure what the deal is, but I get some bubbling in the veneer, that's why I'm using the weights to try to keep this from happening. I'm using DAP Weldwood original contact cement (not water based), two coats on each surface applied with a roller. I follow the directions to the T and use a small wood block to put as much pressure as I can sliding it along. Everything seems to go smoothly until a while later I notice some bubbling. Looking back, I think I've been putting it on excessively thick, perhaps. Maybe too thick = too much evaporating gas = bubbling? The last time it happened, though, was about 6-7 days after applying, and it seemed much more due to the veneer absorbing moisture and warping. Lesson learned, I guess - I won't be buying relatively thick "raw" veneer if there's ever a next time.