No, haven't sent any rails to Mark. Have played on his tables though, bar none the best playing tables I've ever hit a ball on. Not sure about others but I think if I ask Mark he'll fit me in.
Oh and the new Blue label Diamond's that play so good? The rail angles are what made the difference on those tables. Who's angles did they copy to get there? Hmmmmm, Mark Gregory....... Not RKC.