Creality CR10(s) - Base plate upgrade with 120mm fan and raspberry Pi

I modified the very good idea from stevenfayers who created a new base plate for the Creality CR10 control box.
Check out the original thing: https://www.thingiverse.com/thing:2838150

My modifications:
- complete redesign from scratch, but kept the idea of the legs and the fan housing
- new middle leg for increased stability (mine was a little instable, maybe I used the wrong settings)
- rotated the Raspberry Pi mounting so the connectors facing backwards now. This looks better in my opin