A lot of people (myself included) are experiencing glitching on this model (Funtana 90) using Hitec digitals with the antenna ran in the provided tube. I cured mine by twisting the servo wires and wrapping them around each other but were I doing it over again, I might just run it to the outside. I think the glitching in my case is due to running the servo's at 6 Volts as it seemed to go away after a couple of flights.