I took a dremel to the corners of the pickup cavities to get my EMGs to fit in my RGA121NF. I also chipped out those small pieces of wood that sit in the cavity.If you cut away alot of the excess wire and run them neat enough, you can get two batteries in there. I only use one, but I can fit one in between the selector switch and one of the pots (surrounded by a little bit of the foam that came in the EMG box and another towards the bottom control cavity. I put an 85 in the bridge and an 89 coil tapped with a push/pull pot in the neck.
