Leading on from my post on the natural slate kitchen floor, which turned out to be a nice job after the good advise. That good the customer decided to buy Chinese Slate for the walls!?!? Admittantly this is the first full job using slate and hopfully the last, every tile is a different size, thickness and not square! My grout lines dont line up and I'm fighting with them to keep the overall look right. Any advise on this, I've done one wall and will be back on the job friday to finish off.