Winding You Up

As I do more and more dyeing and spinning, I realize that it would be useful to have a skein winder. However, they are rather expensive, especially considering they consist of a spinny thing with pins sticking up to hold the yarn and a crank to turn the spinny thing. I do have a spinning wheel, but cannot figure out how best to attach something to the flyer to harness the wheel's motion to allow for foot-powered skein winding. Ideas?