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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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Thank you for the suggestions, I found this remix and printed the example part for the idler that includes a lever. I tried it and it works great, I can now push the filament very easily even when the spring is very tight. So I guess problem solved.

Customizable Bowden Extruder | Mount for ANET A8 & Others
by TNS