One thing I should mention is that I lay the Fractal Midi R2 on it's RT-Hand backside side because over time. due to the weight or misalignment of the XSPC Reference PCB Cards, cause the 2nd card to loose golden finger contact on the PCIe GPU 3.0/2.0 x16 MB 2nd slot and subsequently loose CF.
Always have a way to prop the card up, if adding your own cooling. Nylon rope, zip ties, cardboard stands, whatever. On a lot of WC rigs they 'hide' the supports, integrating them, by having the fittings and hoses be so close enough to other loop parts that they help support the cards.
Very clever, for something that will be shown off. But, if not shown off, rigid foam, folded cardboard, a short length of PVC, twine, or an anything else that can push or pull on it, will do. Before buying my case with a support, I had an MK-26 on my card, and had the cooler held up some by paracord (inner part only). Ugly, if that were to matter to you, but it worked.