I am currently in Calculus AB and working on the volume by rotation unit. I found it really hard to visualize some of the problems, and when my teacher overheard that I own a 3D printer, she asked if I could make her some models for the class. This was one of the hardest to visualize, so I made this one first! Once I clean up the OpenSCAD code I used to create this, I plan to make it public. Please let me know if there are any solids or problems that you would like me to make in the meantime!