I want to buy the Chosera 5k and 8k snow white. Some folks have trouble with cracks and others don't. I have owned the Chosera 2k for years and no issues. I read that the lower grits aren't prone to craze, but the higher grit Chosera's are. I believe a lot might have to do with the type of climate some people leave in. I live in East Tennessee. Any thoughts?