See renderings here Anyways, started to work on the HDD cage today for this. In the end there will be ~5-6 3.5" HDDs in here. That's called 80-20. It comes in standard sizes and very strong and easy to work with. Front view of HDD cage: Profile view of HDD cage: It's still in the works. I kept a about a 2.25" gap on the and a 1" gap on the bottom for cable routing and fans (a single 120mm). There isn't going to be much good things done (etching, main frame,etc) for a few weeks as I want to get the easy and boring things out of the way first. The inside stuff like this are going to be a bit rough around the edges at it won't be visible at all. Main emphasis will be paid to the top shelf.