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'm assembling your fan right now. I'm using matches to maintain proper air gap between rings. May be you should make some spacers on inside ring? 12-20 pcs, 2mm long?https://www.thingiverse.com/make:241017
And parts names: inner and outer rings are confused.