No advice, just a quick mention: Here is the 1HP minimalist module that matches the borders, which you can use to create the appearance of two cases side-by-side. It's what I use as a separator between my cases. https://www.modulargrid.net/e/other-unknown-1hp-spacer-for-minimalist-rack
-- Toccata
Thanks! Also, I appreciate your rack design aesthetics, very cool.