Bear Extruder 35mm Fan Remix

This is a remix of pekcitron's great bear extruder (thanks for providing the fusion360 files, which taught me a lot). I have changed the fan mount to hold a 35mm fan instead of the usually used 40mm Noctua or Sunon fans which seemed oversized for the size of the E3D hotend and in the case of the Noctua just not strong enough. E3D's stock setup comes with a 30mm fan that is directly mounted to the heatsink.

Changes:
1. 35mm fan instead of 40mm (https://www.tme.eu/en/details/mf35100v1-g99-a/dc