Thanks to Steve's generosity, I can now cut to the center of a 4 x 8 sheet. However, my plan to mount my new Bench Dog Lift table(purchased in 2010 but never opened) between the rails was thwarted by the fact that my Unisaw table is 28" deep but the new cast iron table is 32" deep.
Fortunately the Estate sale purchase included an unassembled Rockler router table. I just finished a new planer sled, now I'll have to track down the hardware to assemble my router table, but that will have to wait till I get some real woodworking done.