I think you are on the right track Maletrain. I don't have signals or detection but my buddy Justin does. He has done it exactly as you describe. He runs the ground from the command station (DCS100) to a terminal strip then from that runs a ground to DB100 Boosters, PM42's, SE8's, and whatever else he has for the detection and signalling. We were in fact just discussing yesterday doing the same thing here. I too tried to put two wires into one of the Booster connections. Not happening. I currently have the ground running from the Command Station to the terminal strip for the PM42's connected to the Ground Loop on the Booster, a DB150, with a suitcase connector. He has 3 DB100's as Boosters so he doesn't require the Ground Loop to convert them, as they are already just Boosters.