Did'nt I read somewhere that bacon grease makes for a good contact enhancer? If I did that "Strange Fruit" camo'd 4th system hanging from the ceiling like you suggest, it would soon become an audio-pinata when my wife found out what was inside. I can just see the rectifiers and plastic pineapple parts flying about the room once that broom handle starts swinging! I'll keep my cap at three systems and work the switchbox angle so I can take part in more of that squeezebox playing at night!
Marco
Marco