Muldivo Mentor Mechanical Calculator - Fixing a Broken Gear Tooth

Very nice. Well done . Would also. Be nice to machine up a new part. I have a little maxnc CNC mill perfect for this kind of work . And an ender for printing.
Out of interest what if any lubricants does this little device require ?
Thanks again

Nice video. If it’d been me, I would have sourced a tatty Muldivo/Walther and robbed a gear from there, but it’s good to see that 3D printing could be an option for impossible to obtain parts.

How did you remove the carriage that easy? I tried on Walther forever and finally decided not to remove it... On mine, I have round hole on the place where you have something like "cap"