I'm looking into getting the Clam C 560 Thermal. They say the fishable area is 56 Sq. Ft. (71/2 X 71/2 FT). I'm assuming that's the dimensions on the floor? I have an Eskimo Quickfish 3, they say it's 71/2 ft square, but that's at the side bump outs. I don't want to buy the Clam then find out it's the same size as the Eskimo. I need to know for sure that the 71/2 ft square measurement is at the ice. Thanks!