I've been looking for some sanders to use with an old Oral-B toothbrush for a while. I found a few models, but they weren't satisfactory because they were fragile. I designed this one with a reinforced base and four vertical supports. The shaft is reinforced at the base and shorter than those I've tested online. A piece of Velcro glued to the base allows you to refine your 3D prints. Each piece uses 1.37 grams.