I've flown with my kgo a few times, no issue. My new round of travel will be a provari with a vamx or vtube as backup. I know the PVs are good, been there, done that and read the threads. My worry is tanks, and a syringe. My surrent tank rotation are all syringe fill, with a needle. If I have two or three filled tanks and a bottle of juice, I can see that being ok...but a needle? I suppose I could fill four tanks. What would be better?