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 wish I would have found this a lot sooner!
I finished printing it this morning and put it right to work with a spool that wouldn't fit the spool bar on top of my Creality Ender-2. It was too thick to sit safely and would have fell off eventually. I tried to jury-rig a work-around but it didn't work.
Your idea is one of those "Why didn't I think of that?!" solutions.
What is better is that I didn't need to go to the hardware store for bearings, etc.
I'm going to make sure all my friends find out about your spool holder as it is an elegant solution that just works. Thank you for sharing this!