A few updates!
1. Thermal Divider
So I've finally made up my mind about how the thermal divider should look and this is what I came up with (as always, the images are linked to the full sized version):
As you can see, there are cutouts for the HDDs and the PEG connectors, but other than that, this 6mm thick piece of acrylic insulates the PSU from the GPU both thermally and in terms of airflow, so when a GPU is used that dumps most of its heat into the case, the PSU should stay as unaffected as possible and the heat will be exhausted through the side and back vents.
2. Back Vents
Because cards like that partially exhaust at the PSU and because there are a few Mainboards that block their side exhaust, I decided to add back vents to the case to allow the hot air to take a controlled path. The vents above the Mainboard and below the GPU are cut over the bend to prevent the sheet from ripping at those edges. When the time to prototype comes, I'll get different versions of those back panels to see whether the vents will actually make a difference.
On a side note, that picture also shows the new GPU mounting with screws and small cutouts for the bracket tabs to fit in.
4. Vent redesign
As you can also see in the previous picture, the vents for the top and front panel were redesigned to fit together better. I didn't find a vent pattern for the front panel that fit with the angled vents on the top panel satisfyingly, so I made them the same. These may still be changed but right now I'm quite happy with them. Maybe I'll get different versions for those parts as well and see which pattern looks best in reality. I could also learn to render properly, but that's not nearly as much fun.
5. Horizontal Stand
You may have noticed four odd holes in the top panel in the last picture. "What are those?", I hear you ask. Well, I'm glad you did because those are the mounting holes for the new Horizontal Stand:
This stand consists of a sheet of aluminium and a block of transparent acrylic which is screwed to the top panel from the inside. Then the top panel is screwed to the case, and then the stand is screwed to the block of acrylic.
This means that the installation is a bit complicated, but it also means that the stand is very sturdy, very stylish, and allows for optimal airflow. I reckon the stand will be sturdy enough to place a screen of virtually any size on the case. This design also allows the top panel to stay relatively unaffected optically.
6. VESA Mounting
And the four holes for the stand also allow for a VESA mounting solution. To make that work, I adapted the idea of french cleats in woodworking to sheet metal:
The grey piece get's screwed to the VESA75 mount, for example the back of a screen while the blue piece get's screwed to the top panel like the horizontal stand. Then, you just let the blue piece slide into the grey piece and secure them with two screws. Those pull the angled flanges together so they are secured quite easily. I may need to add ball-washers to account for bending, but the basic principle should work.
That's it, thanks for reading!