Uncle has no idea about money. He doesn't realize that anti-gravity can make us rich and fund all our other work!

The Martian craft had enough "cavorite" that we I think we could make a small number of items to sell, and still have enough for a small space craft (Uncle wants to put it all on the space craft). What could we sell? Anti-gravity boots? Just sell the spare plates as they are, to the army?

Should we make anti-gravity boots - what could possibly go wrong?? Or should we Sell the secret to the army? Or should we Work out how to control it? Or do something else?