The wooden end panels (made by a neighbor to match my Moogerfoogers and Subs) were mounted on the outside of the black 104HP 3-Tier Rack to show off the wood better. It takes some force to get the final frame screws into the base of the frame (since the width of the 3-Tier Rack is now a little less wide), but it was worth the small effort.
I tried the AIRA delay, and was actually rather disappointed as it noise floor was unacceptable, maybe i had a dud - returned it in the end as the buzz was too much.
This rig of yours however looks super fun!!