Jim, when I had a three tier rig, I did the same thing. And, I believe that those using a B3 or a piano, especially an upright, had the same wall between them and the audience. With my current rig, that's not a problem. And anyone standing, or dancing within 15 feet of me can see it's really me playing those keys, but sometimes I doubt that they even notice. Either position, maintaining eye contact with the audience is of paramount importance, at least I believe this is the case. It's that eye contact that connects you to them.

Cheers,

Gary