bought the big 18 by 26 comm baking pans from Ebay... http://www.ebay.com/itm/Polar-Ware-...276623?hash=item3f3c84d00f:g:hDcAAOSw-jhUCg11 the roost is above. Hubby framed roost to accept three of those pans. well originally he framed for those black boot trays. but so lite weight by themselves. I plan on puting pdz in them. But for now using the Peak brand boot trays from TSC..$4.99 I paid each.. http://peak-shoe-care.myshopify.com/products/peak-boot-tray to catch the poo.. but the boot trays are curvy. so thought about plastic trays from Ebay o line the alum ones..The 18 by 26 are stackable. would post pic for yall to see but its late and dark outside.