This one features Qui-Gon Jinn and Darth Maul spinning around a 4 pole design
Its very simple and easy to build. With the right rubberband, it can run for a long time. This particular one tested to over 15minutes
Basically you have a central tower which houses the rubberband and four poles around it to for the wrapping and unwrapping.
This is a very simple and straightforward project which I believe can be easily built just by looking at it
Step 1: Swinging Arm and Winding
To wind it up you simple slide the link away and remove the arms and wind up the rubberband.
You can try a different number of arms and different number of poles it works well with just one arm, 2,3,4 is still ok but i have not tried beyond that. Two arms and four poles is my favorite configuration.