CR-10s High flow heavy duty 40mm fan duct

EDIT: updated .stl to add bolt head clearance. have not tested it but it should be more than adequate. TEST_DUCK V2

I got tired of flimsy fan mounts that had limited flow because the air was aimed directly at the back plate of the hotend mount. So i designed this heavy duty fan mount that mounts on the side so there are no obstructions to the air flow. This is especially necessary when printing at extremely high temperatures when heat creep is an issue. I also angled the fan upwards so it