CR-10 Base upgrade for 120mm fan and optional RaspberryPi

Hi !

This is an upgrade for CR-10[s] to mount according to your desire :

- 2 x 120mm fans
- 1 x 120mm fan and a RaspberryPi
- 1 x 120mm fan
- Just the RaspberryPi
- Nothing, because the base is already cool alone :-)

According to your choice, print only 2 x "CR10 - Base - 120mm Fan Support" or 2 with the cover(s) that you need !

Just use 4 M3x6 screws for assembly the 2 principals parts. For the Pi, use normal 2.5x10 or 2.5x12 screws, and screws sold with a fan to fix a cover int