Robo R1 Screwless fan

Here is the CAD: https://tinkercad.com/things/issjkUuMiGI

Based on
https://tinkercad.com/things/6YG33TxYcvV

Updated v2, smaller and lighter, thinner walls, shorter.

To be sure the carriage can go all way to the top use 2 regular fan holders or use one large and one regular, the large can only be used in the front side, otherwise the carriage can not go all the way to the top.

regular - back fan or front fan
large - front fan only

This fan holder works with this carriage