EDIT 20250601: I made a new version with built in breakaway supports. It cleans things up a bit. Please use a .8 nozzle, im guessing with a .4 would not be easy to break these supports off.

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Print on a large printer like the H2D, use a .8 nozzle to not need any supports and get the most strength out of it. You'll suck back a lot of filament, but it is, in my opinion, the perfect filament storage solution.