Website: thingiverse
Author: LoboCNC
Price: Free Download
File format: .Stl 3d printable
Description:
What is more fun than a spool holder and more useful than a marble machine? A spool holder/marble machine! This extruder-driven marble machine uses 6mm airsoft pellets as recirculating bearing balls for a friction-free spool holder. When you get tired of watching your printer print, you can now keep yourself entertained