Ultimaker 3 core holder
thingiverse
A simple holder secures the printcore near the printer at all times when not in use. To assemble, screw together with a straightforward bolt nut. The holder grips the core firmly like it does in the extruder itself, so it won't easily fall out. Also, the clamp fits snugly to the side of the UM3 machine. Designed and printed by https://www.mtb3d.com/
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