Well, had 2 great flights this morning, I swear I got 10+ minutes of flight on that 4 oz tank, I was waiting for it to die, it wouldnt fly hands off for me but it was close to it, may have been windy up there....it was the 4th flight on the .40LA maybe its broken in already, I fill with a syringe and the 2nd flight I only put in one tube full and it still flew around 5 or 6 minutes, I couldnt believe it..out of dozens of flights (1/2a) this was the 5th time I landed a plane with wheels on it, looking forward to many more flights,,...Rog