I guess for others trying this in the future with the S4M, I could see there is an option to use an ITX or Low Profile GPU and see if you can fit the HDPLEX 500W unit.
I can see @riba2233 forthcoming U-ITX case being a good fit for the this board. You could use a much more powerful GPU and have the 500W unit fit perfectly. You would still need to figure out the cables.
Might want to try the Shiny Snake S400V2. I think there's just enough room between the SFX PSU and the motherboard to make it work. Although you won't have access to the front USB's.
Can’t believe I missed this discussion. I wish they would sell just the Deskmeet boards separately without the other parts.
I’ve been wanting to put one “in” though maybe “on” is more accurate with the XWorks X32. It would only get slightly past the ITX edge and line up closer to a 200-220mm GPU. The front IO just becomes a bonus.