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.
I have bought an Ender 3 (less Pro) and I have the same problem. It does not really fit, and when put aside the brass tube, the filament won't feed properly...
Maybe it is time for my first remix :)