Thanks to Christoph Laimer for his design. I made it in a festive asian color scheme, and a metal spring power source.
The metal spring used can be found cheaply on amazon and is really a recoil spring for a chain saw, model ATVATP 2 Pack 4224 190 0600 Recoil Pull Start Spring. The only thing I designed is the post for attaching the spring.
I used the massey pin from xiphmont:
and essential everything else from Christop Laimer design, except that I made some of the holes bigger to use 2mm dia dowel pins instead of 1.5 mm.
It runs between 2-10 minutes than become stuck. So there is still some friction to overcome with some parts. I may lube with teflon powder and machine oil at some point to see if this will solve the problem.
I added a plate to make working with the metal spring easier. In essence, we will be making a smaller goring barrel and attaching this smaller barrel to the larger one in Christoph's design. Hopefully, the picture can give people a sense of what to do.
Here is a link to the parts on tinkercad, for those who want to mod for the particular sping model.
In any case, what I found in the assembling process it does not matter if you have metal spring, the watch will not work if the tourbillon does not move easily by hand power.
Also it is easier to assemble the top part of the watch, the tourbillon and the middle main gear train before attaching the going barrel and the bottom case cover.
I design a replacemnt Going barrel for metal springs. Here is the tinkercard link to adjust the parts to fit your spring: https://www.tinkercad.com/things/i1PJYPI4kWM-metalspring
prusa, sunlu, tt PLA, PETG
red, gold, silver
PRUSA silver PLA, ttyt gold and red PLA, SUNLU red PETG