I am sorry, this is a little off topic, but I want to show you what can be achieved when one puts their mind to it! This is so simple, its just ridiculous:
Timing - The Angle at which the Light is shined on the Solar panels! Simple!
Power - Solar Powered! COP = Infinity!
Bearings, mostly magnetic Bearings are employed, with some stoppers for balance.
Amazing and Simple! See what is possible when we put our minds to simple things!