I seem to have missed it until now, thank you!
Yes, from what I could gather, 6.5 is quite insufficient for the Mini-ITX Luke used in his build
Thank you, I honestly didn't think about that! Update, as the idea develops:
It would seem people have had positive experiences with m.2 to PCI-e adapters (currently best I could find is m.2 to USB3, and I already have a PCIe 1x to PCIe 16x riser that might work) with relatively low performance drops (details here).
The reason I'm thinking m.2 is because there are Mini STX (5x5) motherboards that support 1151 CPUs and have m.2 slots. Wondering if this specific combination ever worked for anyone.
For the cooling, I'd probably remove the bottom of the keg and mount a big fan to double as a support maybe with vents on the top of the keg, and some basic IO on the back of the keg. I just hate the fact that I don't have the parts to actually see how everything would fit (cables and all).
For better cooling and more space, I'd also consider a water-cooling system with a heineken beer bottle (to respect the theme, and maybe also add some green LEDs for it to double as a swag light) as a reservoir for the mineral oil.