I saw somebody with a similar mount at a rally-x in VA. Great idea. I was thinking you could make it even more stable if it attached to both headrests. Of course, then the seats would have to be in the same position. I was also thinking you could just drill holes in the bar for the headrest to mount through. Then you just pull the headrest out, slide the mount on, and put the headrest back on. Probably not very stable if you do that though.