Get virtual Contraptor
- Download and install Google Sketchup. It's free and runs natively on Windows and Mac OS, as well as on Linux under Wine.
- If you've never used Sketchup, it's highly recommended to watch several short tutorial videos, they will get you productive in no time.
- Open Components panel (it's in Window menu) and type contraptor in the search box. Various components and assemblies from Google 3D warehouse will appear in the panel.
- Click on anything you find interesting to download and drop it into the main Sketchup window.