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.
If you scroll down a bit, you'll see a stackup that I posted and a few tips...as well as a YT vid - but that probably won't help too much.
If the spinner tip is giving an issue, that's kinda strange. It's one of the simplest parts. Hopefully you don't need to do much troubleshooting for the other parts!
The fan doesn't need anything beyond the custom supports. My tip for the fan, is to slow things down. Each blade is narrow/tall, so it may get some wobble if you go too quickly. I've printed 4 of these now...and even though it's taking 50% longer to print the fan than it did for my first one, slowing things down makes it look MUCH nicer.