Implemented line-separation on spools

Created by: gehringer

Separating the lines on a spool might prevent them from tangling. I experimented with different solutions (stacking etc.) but ended up with keeping them on the same spool, i.e. same diameter, just separating them by "separation discs". Works on the same base.

Not the most elegant way perhaps but printing works. These separation discs "lock" by a slight turn an can be locked by securing the line in the center of the spool (after passing through a whole in the separating disc).

Happy hangprinting! chris