The A800 Pro will totally control the BK7 and it comes with software to help set it up.
SOMEWHERE I have a complete setup I saved when I had this rig. I had 50 buttons, sliders, etc. programmed to control the BK7, and could do a lot of things you can't do from the module itself.
I also have a similar setup for the Ketron SD40.
If you go this route I'll try to find it if you are interested.