I used the inside windhield mount, haven't had any problems with it. Once it's stuck on it's there until I pry it off. I was thinking about picking up a second one for an exterier mount. Thought that would be some interesting video.Cool. Looks like you picked up speed on successive laps. Nice to get to 148 on the back straight too!
I have a GoPro also. Which mount did you use? I have not had much luck with inside windshield mounting so far.