My wife quilts (award-winning level), I work wood and metal. She bought a couple boxes of bobbins that were pre-wound, as that is less time-consuming and wasteful of the spools that she has to tap into. Plus, a real time-saver. But the bobbins are in cardboard boxes, and she has to take them out a lot to locate the color she needs. She asked me to make a rack to fit inside a plastic box that she had already bought. I got into my design software and made a rack for her. The "posts" really are vertical; the pic was taken up close.