Great questions! We formed the words using Solidworks, which is a CAD program our university gives to us. There is a free alternative which is really popular and able to do exactly the same called SketchUp.
I’m not quite sure what you mean by machine compartments, but we built the printer from Bosch Rexroth aluminium profile and Nema-17 stepper motors.
If you Google ‘f3d 3d food printer’ you should see some news about it! And feel free to ask more questions!