好正既送料轆

Universal stand-alone filament spool holder
http://www.thingiverse.com/thing:508896

仲拍埋片咁有成意添
https://www.youtube.com/watch?v=X6ArZeWYSZE

真係勁正, 改少少可以放係 Kossel 用

Really amazing,  no metal bearing or screws necessary !

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