Can someone with both a Treo 600 GSM and CDMA version take a look behind the large rubber plug on the back beneat the antenna? Are they identical? Are they in the same spot on the unit? I am asking this because of the Treo 300, only the CDMA version has an external connector port.

Also, does anyone have the THB car kit installed with an external antenna? How is the performance? Does it give you more signal bars or range?