I am missing a vent on my old car and thought i would cover it with my allmost as old gps which was fine untill i wired the 4.5V device in directly to hide the wireing and then watched it burn(oops) from over voltage. So now im after another gps cause i just like havin em and am looking at the old Navman (my) series because they are cheap and can load 4wd maps in them apparently and my question is does any one have one and are the maps any gud?