I mounted this to a beveled-edge desk, which I would not recommend, as the mount really wants to lean forward (I also used cork underneath it to protect the desk, which probably didn't help either). However, after some adjusting, I got it verticalenough, only to find out after mounting my monitors (I used a dual monitor adapter kit after I checked to make sure this mount could handle the weight of the kit and my two dell 24\ monitors) that the mounting height is not 17\" as described