Was looking for a Mini Keyboard Holder to attach to my SimRig and just made my first 3D Model.
I've padded the sides and the bottom, so that my Keyboard sits tight with no movement (I have a motion rig).
Inner width is 160mm. Inner depth should be 18mm or so.
The hole is made for a M5 screw, with a 10mm head, which can be maximum 3mm high (so that it is flush with the rest).