Now that just about all the pros want and get 4 1/2" or tighter on the 9' tables they play on for action, don't you think it's time to start tighting some of the Diamond, Valley, and other bar boxes up to about 4"? They make 8, 9, and 10 ball a lot more of a challenge on the BB. Diamond rails are OK the way they are, but Valley and the other brands would need Ridgeback rails added.