UPDATE: new version multicolor available https://makerworld.com/en/models/472191#profileId-381951
I used the cool model by CATIAV5FTW to make a clock. I remixed the fan and the cone to adapt the clock mechanism. The second hand is glued to the cone, so it sping with the clock.
assembly tips:
For the mecanism i use this one from amazon:
https://www.amazon.es/dp/B0C4TMR43L?ref=ppx_yo2ov_dt_b_product_details&th=1
the model is design for these dimensions. Specially important the 22mm core.