Thread: Out of Shape Norton

Has anyone else who purchased a Norton stone find that it is not flat? My 220/1k is off Xcorners. The 220 is quite a bit off, and the 1k a bit less, but opposite corners are sagged down. Not sure of the fact that they were made in Mexico has anything to do with it. The US made 4/8k seem to be right on, but I will have to look a bit closer. Here have a look