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Stocks Tiles
Go onto ATS DiamondTools & order from Alan direct.
Get a continuous rim or a porcelain turbo blade. Don't be put off by the price these blades are some of the best you can buy.
I have just switched to ATS blades I'm using the turbo blade and it wont bloody die lol, it really has put the montolit pro gres to shame and it's 1/3 the price posted!