I installed a set on my 7' valley about 6 months ago...
Clearly a much tougher table with them. Far from the original rails, these just about eliminate slop. You can sneak a few balls in at pocket speed but anything harder needs to be drilled pretty close to center pocket.
I'm far from the best banker around but I definitely find these rails banking more consistent and more true.
I remember seeing that you installed a set a while back... how do you find them?
bob