@ntsaint, Andy,
Here are some photos. After adding this clamp it still moves a little bit on very rough rides, but is very livable. The thing we *really* like about this mount is that you do not have to loosen or tighten it to rotate it back and forth b/w driver and passenger! In one of the photos below I am pointing to the set screw, if you keep that firm but not tight you can rotate the mount back and forth. The clamp is locked in place which locks the tilt of the iPad. For someone pretty anal retentive like myself, I hated our old mount in the 4R where you had to unscrew and rotate and screw it back to move it from person to person.
You'll also note in the photos that I removed the black center console piece so that I could put proper nuts and bolts through the added clamp. This makes it much more secure than just some little sheet metal or wood screws into the side of the plastic and well worth the extra few seconds of effort.
The last two photos show the "driver view" and "passenger view" position that is obtained by simply rotating the mount back and forth.
Last thing to consider is that we are using this with an Ipad Air. So the mount and ipad itself might be a touch lighter weight than your setup making it less prone to move?
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