Just a thought, could you drill a hole in the back of the tray below the empeg, then run the connection for the radio and antenna through that hole and sit the tuner in the tray? That way there would definately not be anything blocking the signal to get to the unit. Only down side is a tuner in the tray and a partially exposed install which defeats your whole "stealth" concept.

But the all important question, does the Sig Other like the Empeg?

Greg