Well, I have learned a bit since my first newbie plunge... And I think I have a clue about how Sasha does the eye thing. Still haven't managed to get Sasha operationally installed. Got something wrong on that. However --

Two balls 

Both with these added dials. Only Left/Right has been wired in at this time. 

If I change left/right on ball 1 to 45, I get 

If I then change left/right on ball 2 to -90 (and adjust the camera angle a bit so you can see), I get 

Rotate one with left/right dial, the other rotates with it. Should work equally well on up/down AND crosseyed but I don't think I need to show that. You guys are all way beyond me and I think the wiring is probably obvious.