there is a whole world of confusing Tange and Columbus also waiting to be discovered not to mention True Temper, then all the USA CroMo derivations and the unpronounceable dedacciai - know your zerotre from your zerouno. I started down the route of trying them all and quickly realised the folly but not before I had inadvertently bought some frames that are leaden, presumably made from melted-down old GPO telephone boxes. I am now a little more discerning and appreciative of the more refined ones from each tubing manufacturer!