I used the Kreg table as well. It’s a great piece of kit.
Mine is 44x44. I had to add cross beams in both directions as the deflection was significant even with a doubled up 3/4" plywood top. I suspect you’ll need to do 2 the long way and 1 on the 44" side. I just edge jointed a couple tubafours and nibbled down the ends on the table saw to fit inside the rails and flush with the top.