Hey folks! I've just completed my Tower Fun 51. I have a Magnum 52 Four Stroke onboard which gives great performance, but shakes the front of the airplane to death. I'm running into an issue with the fuel in the tank foaming. I've attempted to secure it a number of different ways, but the result is always the same. I can get the motor to run well enough to fly for a while, but as soon as it gets to about a 1/3 tank it begins to suck air and lean out. I've heard about octyl alcohol as a defoaming agent but, I don't know A: where to get it and B: whether anyone has used it before. I've read that Armor All and vinyl cleaner works, but I don't want to put a bunch of different things in my fuel when I can minimize the amount of contaminants and achieve the same result without fouling plugs. Any help anyone can offer would be great and I appreciate your time.