Hi,
I created a simplified version of the Mark II body that can be easily printed using a FDM printer (I did my print on a rather old reprap prusa printer).
You can find the link to the STLs and the original Freecad files in the posting Simplified Mark II body
It uses the hardware of the original prototype and in the meantime I am running it with a RP4.
To build the software stack with the GUI you can look at my posting https://community.openconversational.ai/t/mycroft-gui-on-my-mark-ii-first-light/8477 or directly at the instructions on my wiki https://www.thinkthinkdo.com/trac/project1/wiki/mycroft-gui-mark-2_sys
Have fun - Guhl