I'm not sure where else to put this. I was initially planning to build the West Elm outdoor storage box, but after some thought, decided that the design didn't do it for me. I was toying with some modifications and realized that I had gotten so far away from the original that they couldn't really be called modifications anymore. Anyway, I plan to keep the original dimensions except for making it about 2 in. taller. My question is - would 2x2 legs provide enough support? the heaviest thing I plan to keep in the box is a container of charcoal. Grill supplies and small gardening tools will also be stored there. I plan on using 1x3s and 1x4s for the rest of it.