since the tops are thin sheet metal, and the bottoms are circuit boards, i don't think we'll see mating surfaces there. but they could probably make some side

since the tops are thin sheet metal, and the bottoms are circuit boards, i don't think we'll see mating surfaces there. but they could probably make some side grooves, and little cutouts for spring loaded latches to catch on. add some cutouts on the front that something could grab onto, and you might be able to avoid the need for the sled and screws, without building up an entire latticework out of drives. there probably needs to be structure to hold the back plane(s) and line them up with the drives, anyways.