I'm so glad I found Shapeways for on-demand 3D printing. I'm a mathematician and occasional designer interesting in polyhedral dice. Before I stumbled on this amazing place I was making my dice models with paper and cardboard -- not very sturdy as you can imagine. So far I've seen some really beautiful and intricate dice that put my humble designs to shame. Looking forward to honing my design skills and becoming more proficient with Sketchup.