I planned to do an 8 ft island with two ft base cabinets on one end and two pedestal legs on the other end. With 6 ft of granite open underneath for seating. My GC is now worried the granite would have enough support in the seating area and wants to add another set of legs which we don't want as it would rule out being able to fit another set of chairs. I could use some help to show him how granite can be supported. Thanks