Max speed in the video was 45 MPH, neither the blacktop or lime-rock grade were particularly smooth. Max speed with camera mounted on RTS, about 65 MPH. Mount has been in place for 1 ~ 2 hours at a time, I pop it off to download video to computer... Wipe suction cup and panel with wet cloth before mounting, should be good for at least 12 hours. (probably many more)
I haven't tethered the camera/mount (yet), but no problem to use shock cord or parachute cord from camera/mount to mirror in this location.