I am running out of room again! Of course all the books say never to stack. But I see stacked canning jars in many of your guys' pictures. I have been stacking 1/2 pint jars with cardboard in between and the jars offset so the weight is on the seal, not the middle of the jar. What do you all do? Do you recommend cardboard, plywood or anything? Or just making sure lighter jars are on top. And how many times do you think you might lose a jar? DH did build me some more shelves, but the space they are in it's only 1 jar deep, so they filled quickly. We have a few other areas we can squeeze shelves into under the stairs, but those will fill quickly too. Someday we might get the garage cleaned out of all the unpacked boxes and get something else built! I do have 2 small cupboards in the garage as well.