I show above my very basic Ferris Sweep base for a mod created by Ben Vallack.
It positions the PCB at 7 degrees angle slightly over a desk surface.
It requires 6 mm silicone/rubber pads to keep the keyboard stable.
I use a thick pad to support my wrists when using the keyboard.
In the attached archive I included STL files for both hands. I printed mine in PLA with 0.2 mm layer height.