Thank NOP21 so much for sharing such a gorgeous design.
I've made some modification in order to make it work with my setup, including:
1.Changing "petit_pignon_entrainementbas-_MOD" gear to 46T;
2.Changing top side of "pignon_intermédiaire" to 14T;
3.Removing the outer ring of "pignon_90" to make it easier to file the teeth.
By changing the gear ratio, my spring can now drive the whole thing without problem. Although the runtime is reduce, it can still run for 7+ minutes with the spring fully wound. I've uploaded my modified stl file. It might worth a try if your spring is as weak as mine.
Here is my running video:
The pignon_90_mod should be printed with 0.1mm layer height.