I fly mine with a TT.46 that is still breaking-in (and thus slobbering rich) and can easily fly for 10 min @ 1/2 throttle without using more than 1/4 to 1/3 of a tank. Unless you're flying a marathon at full throttle, I can't see a normal flight using a full tank. I haven't had any problems related to fuel/ tank height with the stock configuration.