ORIGINAL: cwrr5
Jaka's advice is all good, and exactly right. I am however, wondering what the "sucking tongue test" is also... never heard of that one before either! (15 years of flying)

Good luck! [8D]
I know what he's referring to, but I don't recommend it. He's sucking on one tube from the tank and holding his tongue over the tube to see if the tank leaks. I don't recommend it because I doubt anybody here would enjoy sucking up nitro fuel. yuck!!!!