A little expensive for something an average tinkerer could do in one evening. A computer fan, motor speed controller, a 12v lighter plug, some wire, the plate (any choice of material, aluminium, carboard, plywood etc...) A zippy box, wouldnt cost any more than $30-$40 I would say, if not less if you have access to suplus material. Great idea though, at least the website gives you ideas
