If they want to survive and thrive, they need to be on Discourse 
I’m still going with the Velka 5 not fitting what I said.. because, and I’ll highlight for emphasis
I’m not sure you can physically build a smaller standard mini-ITX system than the DAN A4 SFX, at least not without custom parts!
Custom parts puts you in a weird place. I like that the Dan A4 SFX does not require any custom parts at all. Here’s my original review of it from a different forum in April 2018. This was a build for my son so he could become a Fortnite pro 
This case really is a marvel – it is exactly right for a full sized GPU, SFX PSU, and mini-itx mobo. Just enough space to work in without it being a knuckle-busting pain. And so nicely thought through in every detail. Even the manual is IKEA level clear!
For such a small case it is surprisingly clean inside even with a rushed build like mine where I spent almost no time obsessing over cable cleanup. The split brain “GPU side” and “mobo and PSU side” design works well, and we’re on V2 so the initial problems have been ironed out. It has bays for two 2.5" drives as well (one on the bottom, one on the front), but I used the single M.2 SSD slot on the back of the mobo – not visible in the pics, obviously.
My only minor complaint, and it is very minor, is that it would be better to find a SFX power supply with shorter cables, there’s a fair bit of smushing excess PSU cables under the PSU there. Plus I went ahead and wired up the second 6-pin power connector even though the 1070 Ti I put in there, doesn’t need it, as well as the SATA power connectors too. I figured better to keep those extra PSU connectors in the machine just in case, I’ll lose them if they float around my office.
I even took thermal pics of that build
Note that I was not going for maximum power like I did with the Streacom DA2 for myself.. but two giant fans is a complete fantasy on the DAN A4 SFX .. that said, you can wedge a 92mm thin fan in the front bottom, which I did do.
