Disclaimer: This is a work in progress, I uploaded the stl so I have a place where I can document the progress. Do not print yet. I will make multiple stl's available so you can print groups of parts.

This is a remix of the awesome Plot clock / thermometer designed by smily77.

I had trouble getting the hinge apart from the main body and since smily77 was so nice to share the source for the body on tinkercad I took a shot and adjusted it to my needs.

I reworked it in a way so that the hinge can be mounted with M3 screws. Also all needed parts may now be printed without support.
I removed the holder for the magnet, since my 3d printed drawing board just stands in place without any additional help.
The whole thing may now be parametrized, so you can easily adapt the design to your servos and your printers tolerances.