I haven't changed my design since before I heard about the Neutrinos back in the 1990's. But my design is similiar in the fact it can be infinitely expandable. Mine are each 4 ft wide, 8 feet long and I can double them up for an 8x8 square, or tandem them for a 16 footer. I had three at one time, and I would double up two of them, and stick the 3rd one in the back for an 8x12. I currently only use the tandem configuration though, 4 feet wide, 16 feet long, because it's more maneuverable that way. I sit in the back with the trolling motor while my drunken friends sit in front of me on lawn chairs, always paddling the wrong way when I tell them which way we need to go when we get in rapids. As a result I've learned to build the rafts stronger.