I bought mine from Circuit City. While I didn't shave my rear mast antenna, I disconnected it and leave it retracted. I glass window antenna is not the greatest, but it pulls in most of the stations in most areas. The weaker stations go out in certain places though.Bread said:I still to this day have not yet found one of these. I would like to use my rear window antenna for the radio and shave the rear mast, but I need one of those dang things.