Santa brought me a Zumo 665 for Christmas. It comes with an antenna for Sirius XM. Mounting the antenna seems to be a bit of a challenge. I would like it to be out of site. The documentation says it will work if its located under a non-conductive surface. The manual says it will work in a tank bag or a top case, for example. Neither of these locations is an option for me. Has anybody mounted one of these? Any suggestions would be greatly appreciated.