I am in the process of upgrading my audio by adding an AMP and better speakers. I have a 2015 RGS. I have read here that some have added hidden antennas? Is this something I should consider or just for the older glides? What can I expect to get for my money? I figure I should do it now while I have the bike dismantled but only if I need it. Thanks in advance! BTW, I have the external antenna and I have no reason to remove it if it's doing the job. I'd only change it it provided significantly better reception.