Hi..put all new batteries in and took out and plugged back in both the crystals...still doing it...(not as bad but still doing it...hit and miss...) I wonder if its in the tank or controller..either way I guess I have to pay to ship it back to toyeast and or pay to have a new one shipped back to me..(since the shipping cost is so much I may just deal with it and forgo the middle speed..which is a bummer because that is the speed I would use most..