Ridgeback rails will not tighten the pockets. They will be the same as the valley rails unless you extend them. I had mine extended, but even though the table is nice, it is not a diamond. They still have a shallow pocket. With that said, the new valleys are a nice improvement with the flush pockets and 5 bolt rails, but I would have purchased a Diamond if that what was prodominately used where I live, 99% valleys here.