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.
Actually, we have included all the instructions (below the summary under Thing Details, sort of hidden but it's there we promise). There is a link leading off to the code we used as well. There is also an image showing how to wire everything together. You're right about the servo tester. There is a better way to do this and we plan on making a second version.
Check out our instructions and if you have any other questions, we'll be happy to answer them.