Modular Magnetic Effector and related stuff

Magnetic effector, carriages, and other brackets for a delta.

I wanted to easily add fans or prox switxhes. So I tried to come up with a modular design that could be used with different brackets for fans and sensors.

This is a heavily remixed version of this one.
https://www.thingiverse.com/thing:1540203
Thank you.

The effector I reworked and made it with places mount accessory brackets, cooling fans, prox switches.

I also made it to use 12mm magnets and 10mm ballends so I could