Just added small locks to the tube and flanks. That way, no risk the spool will “open” all by itself, and still makes it easy to take apart if needed (for example when not needed).
Supports mandatory (organic), but they are really easy to remove.
2024-03-18 edit : added a tube V3, with longer internal grooves. This should lower the risk of accidentally “unclipping” one of the flanks.
2024-04-20 edit : added tube V4. Reversed the grooves direction on one end of the tube, so it's not hard to lock/unlock the plates by turning them with both hands. Added some very small bumps into the grooves to help holding the plates into place.
The author remixed this model.
Small locks on the tube and flank.