Airbrick ventilation adaptor

100mm round flexible ducting to a detachable air brick adapter, this saved me drilling a hole for an extractor fan in my brewery, and means i can tuck the ventilation away while not in use, works well enough.

You'll need to figure out when to pause the printing to drop in the magnets, the magnet size is 12mmx3mm, you can do all four corners but i found it just as effective with 2 corners (4 magets), though don't do what I did on my first print and get the wrong polarity!

I also super glued the magnets in when the printer was paused, this means the magnets don't jump up and stick to the hotend, I should of added a bit more clearance for the magnets, I've added the solidworks part file if you want to adjust the sizes... I'll apologise now for the state of the CAD file.

Main issue i had was the airbrick mount (the bit of plastic you screw into the surrounding brick) as i couldn't get it level, it mostly fits which is good enough, doesn't need to be a hermetic seal.