Lightweight Multi-Spool Holder for Prusa MMU

As I wanted to have a modular and more compact alternative to the original plastic “box” holding the spool rollers for the MMU unit, I designed these holders. Each arm can be connected in a series for a more compact setup. Two units are enough for one spool, and six is needed for the full 5 spool stack. The holder is design to be minimal for less filament consumption. I used double-sided tape in both ends to prevent the stack from moving towards the buffer. Anti glide foam could probably be used instead.