Monoprice MP i3 Mini Wanhao Cocoon PowerSpec filament spindle
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Monoprice MP i3 Mini (Wanhao, Cocoon, PowerSpec) filament spindle

I wanted to save some filament and time to print so I hollowed out the filament holder but kept the strength to carry models ...

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Monoprice MP i3 Mini (Wanhao, Cocoon, PowerSpec) filament spindle alternatives