I worked with my bench mate. The panels were stacked in order with selfadhesive door bumpers fixed to the appropriate edges. The back veneer sheet was laid in the frame press with a straightedge clamped across one long edge for registration. The panels were glued up using a Klebo glue spreader followed by a foam roller and laid on the backer sheet one by one . Then the panel faces were glued and the face sheet laid on with a 1/4" caul . The whole process took just under 20 minutes, within the specified assembly time for the Titebond Cold Press glue we were using. Next time I'll use your suggestion of registration blocks hot glued to the back sheet, thanks.I am also going to switch to using Titebond Extend after reviewing the specs, as it has much better bond strength, particularly with elevated temperatures, and less cold creep. The working time is the same. The main advantage to Cold Press I think is resistance to bleed through, not an issue with sheet veneer.
The whole assembly was a bit cumbersome to flip over after the first parting cut, but doable with 2 people. Normally I would work with smaller assemblies, but with the grain direction running horizontally on a long cabinet I wanted to minimize any shift among the elements. Perhaps your alignment technique will allow me to go back to working with smaller groups without losing accuracy.