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.
The arms of the spool-less coil holder have a core diameter of roughly 200 mm. We made two holes at the end of the claws to fit a small loop of filament so it can hold slightly larger spools. See the image below: