First, let me say this isn't really my shelf mod, it's ours! The ideas you guys have created and shared on here led me to this design. This thing is perhaps not yet complete because it's only "so" stable and I want to take it on a trip in a couple of weeks to see how it does before I finalize it. This isn't going to carry much weight so it shouldn't cause it to lean forward much. I have added 820 square inches of shelf space that I didn't have yesterday morning!! I didn't want to add much clutter to the counter top so I designed it to go up instead of out. I have a gap behind the hinged counter wide enough to fit a leg into. The back of the gap is the bed slider. The leg holds the weight and the square part on the counter top adds stability. The counter space is also the indoor home for my stove, although I usually cook outside. During my recent snow trip, I found it better to keep the stove inside, hence the height of the first shelf. The distance between the two shelves is about 7 inches. The joint above the square section is not glued so it can be turned 90° for stowing. Here it is laid flat for transport. ....and with the sink stowed over it. Materials list with costs:- 2 @ 3/4" x 10' PVC pipe $3.46 8 @ 3/4" PVC Elbow $2.40 9 @ 3/4" PVC Tee $2.70 1 @ 3/4" PVC Cross $1.70 3 @ 3/4" PVC Cap $1.05 8oz PVC Clear Glue $4.18 3 @ 24" Single Shelf Support $8.01 6 @ 8" Single Shelf Brace $13.56 1 @ 1" x 8" x 8' Pine Board $8.98 Total $46.04 Which translates to $0.056c per square inch!