Now that we have a bicycle made of cardboard, how long before we're playing tennis with cardboard rackets? What's next? Cardboard cars, boats, houses? If you buy one of these bicycles, does it ship in a cardboard box? Lots of great possibilities for this technology, but leave rackets alone. They'd be so light we'd have to add a ton of lead or risk a tennis elbow epidemic. I imagine the price would come way down tho… the leather grips and strings would cost more than the racket itself… heck maybe even the dampener for that matter. If we have any design engineers among us, what's your take on this?