9/18/13 I'm a very cautious person so I did 3 road tests with this plate set to slow, medium, fast and fast I mean all highway speeds my problems with the mount disappeared after the third road test. Second, I was worried about the movement, so I cut the circles out of the tyvek to go under the magnet (fixtures) so it doesn't ruin the paint if it shifts. THEY DON'T MOVE AND DON'T MOVE, but having the circles in the beginning gave me peace of mind. I've been using it for about 2 weeks and willβ¦