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 using these on a build for a large delta, they're one of the easiest ways of installing open loop belts that I've tried to date.
50% or higher
I'd recommend printing with 50% infill or higher, the pins can snap off if printed with less