Anyway here's my baby:
Now I have to learn how to design parts from scratch as well as re-use existing designs. Thingiverse.com has a huge number of designs to start with. But I've also had to learn to use OpenSCAD to design the box. (I tried simply using a Gcode file offered here but the differences between Felix printers and Rigidbots are too great. And I also discovered there are no usable Gcode to STL converters any more. There might have been a couple of years ago but not maintained now.)
Then I had to learn about various slicers and dicers to generate Gcode from the design and upload the print task to the Rigidbot. Eventually settled on Repetier-Host for Mac for initial prototyping but also installed Octoprint on my RPi so I can offload print tasks to RPi while I continue with MacBook.