this is a handy little spool roller. you will nee 4 608 zz ball bearings you can find theses on Amazon. Print the rollers with or without support it doesnt matter much. Glue the bearings in, i used a hot glue gun for these. Glue the plasic pins in with super glue. Ive added an 2 way pin and a joiner. if you want you can run 3 rolls on 2 bases using the joiner
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Filament roller
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