I have a question on the antennae location for an XM radio in a car. I'm considering the Roady2 and I'd like to place the antennae low on the dash, by the edge of the windshield on the side where the FM antennae is for the car stereo. A friend of mine did this for a while in his car and he said it worked fine. Will this work ok? Has anyone tried it? I've got an 04 Trailblazer.