I like to keep my Wacom on my desk, but laying flat it takes up desk space. I prop it on its side but it falls over occasionally, or I bump the pen holder. I put this together using openScad and I'm pretty happy with the results. I'll probably add some balance support to the side opposite the pen holder. For now though, it's working well for me.I printed this using Makerware default medium settings on a Rep2. The included openScad file contains some basic comments. I think this should work for different size tablets, I think the pen holder size and tablet thickness are probably uniform across different models. Feel free to ask any questions.