> Don't you lose your presets?

Not at all... my Sony has 2 power lines, one switched (for making a
noise, lighting the face etc), and one permanent (for the presets).  I
just put in a switch on the switched line, as the vanagon doesn't have a
switched power setting on the ignition key like a car.  It means I don't
have to have the key in the ignition to listen to the stereo, like when
I'm working on something completely different in the garage :o)

toodle pip,
--
        Dug Smith         | Terry Pratchett: It's almost
(mailto:dug@dugbert.com) |  impossible to ride a rock and roll
(http://www.dugbert.com) |  motorbike and stay on for three verses.