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 had assumed this was threaded, but it's not, it relies on a friction fit so it needs to be really tight.
I can confirm that scaling to 98% makes it a perfect fit on the latest Ender 3 model.
Works a treat, thanks for sharing