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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When unscrewing the nozzle better work at the rated T° for the filament ! So with such a plastic wrench, good luck.
BTW, takes 15 min to make a suitable tool like an open wrench, out of a 1.2 - 2 mm steel sheet. Easy to find in an old printer, PC ...