From yesterday’s post it became obvious that I need an external antenna for my Magellan Roadmate 760 gps unit. I think I will go with the off brand, since it costs less than half as much. I anticipate that there will be no directions for installing it. Does anyone know how to remove the antenna it comes with and install an external one. I don’t want to actually break anything, in case I have to return it. It seems that the old one just pulls off, but I am not certain of that. Does anyone know for sure.