Does anyone know any reason why you cannot connect two devices to the aux audio (under left pocket on gl1800) and run them at the same time? Has anyone heard Sirius XMof a switching device which would allow you to wire them both to the aux audio but switch back and forth depending on which one you want to use? I would like to be able to use my Zumo 396 and Sirius XM radion at the same time but failing that I would be content to find some kind of switching device that allow me to use the Sirius XM without having to unplug the Bluetooth dongle (which connects my 396 to the aux audio) and plug in the Sirius XM. As a last resort I guess I can set up the aux audio plug in the left pocket and just open the pocket, pull one plug and plug the other in. A switch on the dash would be nice.