Has anyone here used a Soundgate adaptor to tie into either XM or Sirius tuners that allow total control of the satellite tuner using a factory head unit? The specific part numbers that I am looking at are for a BMW. For the Kenwood Sirius tuner you use a KBMWSIR and for a Pioneer XM tuner you use a PIOBMW1. The tech support of Soundgate is telling me that I can control all functions of the sat tuner using my stock 2001 M3 head unit. Soundgate has told me that they started shipping these products at the beginning of the year. These parts will mean not having to use the FM modulator and also will not have to use a separate sat tuner control. Sounds like a very simple, very clean install. Just mount tuner, tie into existing wiring for an aux CD changer with the new Soundgate adaptor and you end up sending 100% digital signal to the stock head unit and have total control of tuner using the CD buttons on the BMW head unit. Limiting factor is how much my radio is capable of displaying text. On my M3 I will only be able to display around 10 characters, however on my wife’s 5 series I will have all text displayed. I am looking for feedback from people who have used their equipment for controlling the tuner and what their experience has been using the interface.