So when checking how to mount my video card vertically I realized, that in an O11D you can either mount a radiator in the bottom OR mount the card vertically, but not both.
To remediate this I designed a bracket that mounts to my radiator and fans, and is able to support the vertically PCI-E-bracket.
I was more or less looking for an excuse to freshen up on my CAD-skills and learning Fusion 360.
My initial plan was to 3D-print this bracket, but after considering the form and forces that will be presented by the cards, I reconsidered and switched to milled aluminium.
This- unfortunately- will take some extra time, but I'm sure it'll improve the looks as well.
I'll update this build once it arrives (in a couple of weeks) and show the results.