I have that GPS/WIFI antenna..... that doesn't seem to have a port though they just sell it with different lengths of antenna cable? Is there an internal port? I found another device that costs more although looks pretty nice. I have a GlobalSAT BC-337 which has an external antenna port but it's a CF device and I haven't gotten any input on weather this would work with a regular CF Card reader? Would be nice since I already have it.