Thanks Anthoop. I have decided to do and experiment[8D] I have an old FMT something or other which has not been up and running for about a year. And I was thinking that I should put the mothballs in the fuel tank and see what happens. Now all I have to do is go to the lhs and buy some servos and a fuel tank. When I put the mothball in the tank should I crush it or put it in whole?