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Air Balloon Motor for LEGO

Demo and assembly guide:

Exploded view in 3d viewer:

Extra parts needed:
- Nitrile glove
- Air balloon

Takes 4m of filament to print (about 5h at 20mm/s on my snail of a printer).
Will print a bit prettier with supports (80deg. overhang, touching buildplate) and ironing.
Parts with names starting with "X_" are optional.

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