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.
You can find different videos about that on Youtube.
This one is from one of my slingshot buddies. https://www.youtube.com/watch?v=tiktkqqfbcI. You should subscribe his channel and have a look on his other Videos. He presents tons of information's about slingshot shooting. Good for newbies and pro's.
The "how to" you can find directly @17:51 if the video is to long for you.