Besides Erwin, of course. Erwin has an ABI that he moved some knobs around on to make it fit.
I have an ABII that Sheldon retrofitted with an OBP-3, so I have no room in the control cavity, an not much room on the top of the bass.
I'm only looking into this because I already have a V-Bass. I love the tone I get out of my ABII. It's just that I would like to make use of this unit that I have sitting in a custom-built hardshell case in the corner of my bedroom.