I built a UAII Also.
Word of advice: Make the CP Detachable.
Also, I made the entire top portion detachable It's attached to the bottom by 6 bolts (3 on each side in a triangular pattern.) The bolts are sunk, and the heads painted black to hide them). INFINITELY easier when you have to move. (I've moved 5 times this year!!!) (by myself, into another house, in with my girlfriend, into her mother's house when her mother passed) now we finally bought a large condo (1250sqft) with a finished basement (not lincluded in the sq footage).
It makes it much easier to move it and take it with you. I think i'm going to be buried in it when I die.