Print two parts, mirroed. AFAIK on UMO it might hit the motors, but I'm 100% not sure. because the umo frame is slightly smaller on width. For the umo frame I have I had to file a bit some parts and change the x/y motor plastic holders. SO, MIND THE GAP ;) For umo+ it works quite nice. Remember to print the endstop. Install and setup should be easy, if you place the nuts inside before pulling up the wood frame. If you are use to do this kind of stuff it should be pretty straightforward.