I made a 1U frontpanel and back panel design in FPD a while back.
However i made it as cheap as possible (I figured i could do an inlay myself). If possible i want to see if i can get 2 GM5x5x5 shoved in there. Which might be possible if you mount one upside down.
I will have to see, if it will actually fit if i receive my case from modushop (NorthernLightx and me bought some cases together) So i don't have a propper layedout backpanel design yet. There is enough room on the front for 1 midi in/out.
The mounting holes are specific for this case.
Personally i am not a fan of the USB on the front. But i can imagine that for you laptop users, it might be convenient.