Anycubic Kossel Controller Box

##Anycubic Kossel Controller Box
This upgrade is designed to provide better cooling to the electronics by changing the mainboard's location. Furthermore, it mounts up to two MOSFET modules.

I designed this upgrade together with the PSU Box, which you can find [here](https://www.thingiverse.com/thing:2668945).

###Why Did I Design This?
Especially when the Delta uses a heated bed, the electronics operate in a warmer environment. To avoid overheating and to mount the PSU when adding a heat