A friend is building a new house. He is going to use (and already has them) the 4X8 panels made of 6" of white styrofoam sandwiched between OSB board. There are several ways to create the holes/chases needed for the wiring, I am not familiar with them yet. Not sure, but guess sheetrock must apply directly to the OSB on the inside...no studs except at the edges of each panel. Anyone ever had any experience with this or similar? I will have to investigate how boxes will mount, and hope I can use plastic, maybe screw thru the "ears" and thru to the OSB. I dread the thought of using steel old work boxes. I use to wire log homes, and this promises to be as unorthodox and weird. Gotta love the conventional "stick-built" homes.