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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I took a closer look at the locking ring and found that it had a bit of a design error. The inner and outer faces were not concentric with each other which caused one half of it to be a bit too flimsy. I fixed that in the updated-updated version, and also increased its width slightly to make it more rigid all around.