I have a Global bar box that I'll be having some work done in August (my league play has a dark month during August). I'll be shipping my rails to Ridgeback Rails for new rails. My table mechanic will install new Simonis 860 Tournament Blue when I get the rails back. The present corner pocket size is 4.5" and side pockets are 5". My table mechanic suggests 4.25" and 4.75" for the new sizes which I'll probably do. The other consideration is 4" and 4.5". My league play is on 9 foot tables and I think reducing the pocket size on my bar box will help improve my potting ability. I've seen improvement in my game since I obtained the bar box about 9 months ago. I'd appreciate any suggestions.