IT is not for feul, but for air.
and it is true - we dont have these tanks here in israel (eben though all regular equipment you can find easily)
ordering from Intenet is OK but i try to concetrate several items so the delivery does not cost more than the itmes themselves...
about the "risks" -what is the point of this hobby if you dont do some things by yourself ah?
i need to know that i've build some of the gear in my model with my own hands.