I just bought a Vision Pro from Happ's, and it won't fit in my cocktail cabinet. I am working with an actual Midway cab with about 19 and 1/2 inches of space inside.
The description claims "shelf mount", but the mounting tabs stick out so far that it is too wide to fit in the cocktail. I checked the monitor FAQ page on the Happ website, and it seems like I got a "universal mount". If you look at the mounting diagram, it shows two different sets of mounting points - not so on the monitor I received.
I called Happ's and was told that there isn't any other type of frame for that monitor, and that I could send it back and get a different (more expensive) monitor that has the type frame I need. Rather than do that I am trying to find someone who has a spare horizontal frame that is no wider than 19 and 1/2 inches. So far no luck.
So think twice about the Vision Pro, or at least don't order it over the internet - call first so you can get the true dimensions!