I've created a 3D model of the NanoPC-T4 and put it up on GrabCAD if anyone is looking for something like this. It's not dimensionally accurate as I had to find 3D parts for the connectors and they are not the exact ones but the PCB and the holes are accurate. It should be good enough to help if you are building an enclosure for this. All the measurements where done with a T4 and a set of digital calipers.

I am using this to create a 3D PCB model of the T4 so I can design a carrier PCB with analog and other interfaces via the GPIO connector.

Leave any feedback you might have here or on GrabCAD.

https://grabcad.com/library/nanopc-t4-1

There is a ZIP file with the Fusion 360 model and all the parts and there is a STEP 214 file.

Cheers.
Dave...