It's never fallen?? I'm a tanker yanker, so I bounce all over the place... But I'm thinking of trying this out in my Columbia.
That may work. I had a 19" before that used the smaller Vesa mount where the four bolts were grouped closer together. But after bouncing down the road for almost a year, the plastic started to crack around the mount holes and it broke away.
not once in 30,000+ miles but we do have a small tie down strap with hooks on each end that insure if it came loose it would not fall .. but so far it has not came losse it has moved an inch or two but I just readjust it and its fine ..