The Barkan MODEL31 hole patters are the same as the MODEL30 but the mount is down angled rather than fixed flat.
Mounting is simple. Attach the butterfly mounting plate to the back of the TV. Anchor the wall plate to the wall stud.
The last step is to slide the butterfly plate into the wall bracket. You will see the thumb release clip lock the butterfly securely into place.
Using the included allen wrench loosen the pivot bolt to adjust for the desired amount of tilt.