Garmin mount
I went to Best Buy and bought a suction cup mount. You're right in that the ball mount is the same diameter as the Atrix's car mount. The sales person told me they are universal. I have a Camry and the windshield was sort of out of arm's reach so the original windshield mount didn't work for me. With the Garmin mount, the suction cup part is smaller and I can actually mount it on the face of my stock car stereo.
The only issue is that I came out this morning and the mount had come off the stereo face. I think this is because I forgot to clean the surface with alcohol. Will try that later and remount it.
I went to Best Buy and bought a suction cup mount. You're right in that the ball mount is the same diameter as the Atrix's car mount. The sales person told me they are universal. I have a Camry and the windshield was sort of out of arm's reach so the original windshield mount didn't work for me. With the Garmin mount, the suction cup part is smaller and I can actually mount it on the face of my stock car stereo.
The only issue is that I came out this morning and the mount had come off the stereo face. I think this is because I forgot to clean the surface with alcohol. Will try that later and remount it.