Someone has probably figured this out: how do connect your iPod to your way-too-expensive marine FM radio/CD player that lacks an auxiliary input and a cassette player. The little FM transmitter I tried didn't work (of course because the antenna is atop the mast). I'm thinking JUST MAYBE a 12V powered FM transmitter might be able to get the signal to the radio without needing to reach the antenna. Sort of like the Powerline broadband routers. Any opinions or other suggestions?