Designed this replica of the Invisio M80. It's just a dummy version (for the moment). Very easy to print. Use pics from the slicer as a reference for placing supports. Printed with both 0.1 and 0.2mm layer heights and the results are pretty good.

You'll only need an m2 nut and a screw, whose head must be removed, that have to be glued respectively in the printed gear and block.