I'm finding myself obsessed with the idea of making about 14 zillion (or, alternately a dozen or so), of the little felt cubes I linked to on the last post. The sort of obsessed where I've taken measurements of my shelves and sourced materials (fancy pants industrial felt that comes in a whole range of thicknesses, and about 3 awesome shades of gray) and made schematics and otherwise gone a wee tiny bit insane.  Can someone out there explain any reason this is a terrible idea?  Am I overlooking something obvious?  Is there some reason this will end in tears? [...]