I need to make some platforms for my boat. I'd love to make steam bent, laminated wood frames, but I don't have the time to mess with that right now. I am going to use furniture PVC for the time being. From what I've seen, there isn't a neat way to stabilize the legs from lateral flexing. What is the maximum height and maximum unsupported span with this material? I'd like my rear platform to be 18" tall with a 30" x 24" top. It has to straddle the tiller and the cockpit, so no center support is possible. I anticipate bringing diagonals into the center from the sides. Can I do this and end up with a strong final product?