I did my best to consider manufacturing realities by leaving clearances between the panels, at bends, etc. It's not a very simple model where I slap everything flush with each other.
The motto is what you can do with 20lts, so increasing the volume is out of the equation.
Something I realize I never said is that the case is using a 20-gauge steel (1.016mm thickness), just like Nova.
On the side panel, the fans would be installed with fan screws which are flathead. Then, thin, magnetized filters would sit on top. I was thinking about Silverstone's 120mm filters (FF123B), which are 1.5mm thick. Demciflex filters are thicker. I would need to make the jog 1mm deeper to accommodate them.
There is approximately 7.5mm between the bottom GPU and the PSU (not counting any backplates). Considering the side fans, I believe it should be fine. PSU will have it's own large fan to take care of it anyway, so I'm not concerned about PSU overheating. There will be vents at the back so there should be plenty of airflow around the PSU.
I strongly believe that the raised floor brings a ton of benefits, supporting 4 x 2.5", or ODD + 2 x 2.5", while using the topside for GPUs and rads.
