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 not tried PETG yet, but from what I have heard, it prints easy and is a lot stronger.
I cant remember if there was anything else specific to this material...
Using PETG like you are for the blades, sounds like a good idea!
Looking forward to your make!