Thanks all, I believe you have answered all my questions. As pointed out, the USB port is pretty useless unless you are going to lug a laptop out to the glider all the time exchange files and with having to toggle the switch on the back of the 302 it is a real pain in the ass to have to remove the canopy on our ASW20 to get at it. I think our best solution is to use the serial port with a PDA for file transfers.