And 5 oz of fuel gets you another what......15 seconds of flying time? Plus add to that the weight of whatever tank that you have to add to get that extra 5oz.......and it probably wieghs what??? Maybe 5 or 6 oz? I am just curious but why would you take a proven design and re engineer it on an airplane that costs $7K plus just for the kit? And I might add the proven design seems to work very reliably.