FrancisTLim wrote:Actually, instead of using an external aerial, I just put the whole GPSR on the roof, tied securely to a magnet from an old loudspeaker. Just put the magnet into a small ziplock bag, and then wrap in cloth to make sure it is waterproof and also does not scratch the car paint. The cloth provides good friction. Make sure it is only one thin layer each. Otherwise, if too thick, the magnet may not hold strongly enough.

