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MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.

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Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!
MatGyver85

"Doubowden" Double Hobbed Bolt Bowden Extruder Assembly

by MatGyver85 Jun 18, 2016
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I'm curious is you're having good luck with this. I'm currently designing something very similar for 3mm filament (it's a bit harder to feed through a bowden tube than 1.75mm).

Sorry it took so long to reply. This drive system works well. lots of grip!