Most arf's these days have an antenna tube running inside the fuse from the servo tray to the tail. If you don't have one in your planes, go to your LHS and buy a couple and install them. I find that my antennas don't get snagged up as much. Good piece of mind for someone who's always catching the antenna on things and worrying about weather or not the thing has pulled loose or broken the wires, etc.

MPB