I got my inspiration from Carol Marine (check the sidebar in her blog). She also provide more info in her Daily Paintworks tutorial.
Carol had added some more structure to her box. I figured all I need is just the frame. Based on her instructions, I bought my PVC’s from a local hardware store where they cut it down for me.
Materials: 8 of 3/4″ corners, 8 of 20″ long tubes, 4 of 24″ long tubes. Belong are photos of what they look like. The photos are pretty much self-explanatory.