Herman is our forum expert on frozen grinding wheels. I was a late comer and did not arrive until 2009, when the shaft on my T7 was the pre EZYlock straight stainless version. I did encounter the the extended dampness problem when I returned my SJ-250, which I thought had dried, to its cardboard box. The box was not ruined, however, it was worse for the wear. After trying several options, I decided on printing the 3D plan from Rich Colvin's Sharpening Handbook. They come in two sizes (250 mm and 200mm). They are non absorbant, joinable, and provide safe, ventilated storage.
Ken
Ken