Is a turbo blade not really suitable for Porcelain Alan? Always bought them as they were dearer so I assumed better on porcelain, but interestingly the Monty DNA isn't 'turbo'. Have an Addax blade on at the minute, and a Tryolit porcelain blade before that. Neither are anything special so will go for the Pro Gres next time I think.
It's not quite as simple as the design of the diamond segment alone.
The diamond content and make up of the metal in the segment itself determine what product the blade is best used on as well as the shape of the segment and the size and shape of the gaps in between etc.
A turbo design is a cross between continuous and segmented and has tended to provide a faster cut (hence it's name), in porcelain though the best finish still seems to be obtained with the hot press, laser cut, continuous rims blades like the blue one I included an image of earlier in this thread.
Fundamentally the material you cut and the finish required still determines the best design of blade for each requirement. It's very difficult indeed to produce an all round blade that will cover most products.
Things like laser welded segments have become selling points, the major upside of laser welding is it's far less likely to throw a segment off if a problem occurs or the blade becomes trapped or you hit an unexpected lump of metal etc. These are far more important in concrete blades than most other types, although we do laser weld our professional granite cutting blades.
