I am really tight on space (no, I DO NOT HOARD...I probably toss more than I should...mostly less that 1/3-1/2 sheet). Currently, we store inventory mats in vertical plywood slots (still trying to sell the full sheets that came with the business). Below them are more vertical plywood slots that contain customers art in sleeves, waiting to be framed with the mats for the orders in the same slot. I'm finding that my mats (especially suedes) are getting ruined because while we're looking for the person's art, we're sliding sleeves in and out. Same with checking inventory to see if we have a mat in stock. STORAGE recommendations for mats? Art?