3D printed Surface Pro 3 Docking Station Adapter
When even Microsoft offers a 3d printable adapter plate too, to use the Surface Pro 3 (9.1mm thick) dock with a Surface Pro 4 (8.45mm thick), but then changing from an 0.2mm to an 0.3mm layer height, so it prints thinner (!) to fit your Surface Pro 5 (8.5mm thick)
Surface Pro 3 Dock 
Surface 4 adapter plate
first layer 
second layer
