I have a 20S bluetoothed to a Garmin XT via page 18 'GPS Pairing' and it works fine. Smartphone is paired to the XT as well... no issues. I'm adding a Sena SM10 into the mix so I can get audible Radar into the headset. I've paired the SM10 to the 20s per the SM10 Manual page 19 'Pairing with the SR10...' (and I assume the SR10 and SM10 have the same procedure). The SM10 pairs and I can hear the Radar, however, the XT (music, Nav, Phone) falls off. If I power down the SM10, only then will the XT come back in. There is a priority glitch and I cant figure it out. Anyone have a sucessfull pairing procedure to follow?