Meanwhile, I sanded, wetted, sanded, vacuumed, and pre-finished all the parts and just kept dry-fitting and fine tuning all of the joints until I was confident in my assembly process. I recruited the help of my other brother Matt as a glorified glue boy and with his extra hands we managed to glue all 84 parts together without any real problems.
Here's the pic:
Next Up: Start the doors: Build 'em. Pre-finish 'em. Glue 'em. Hang 'em.