A customizable shelf for displaying stuff. The default values fit "small suction cups" made by Adams and can display an object the size of a chess piece.
Included are the STLs for a small, medium and large suction cup (again, Adams company).
Many improvements still need to be made. For instance, a double shelf, and a hanging basket where the suction cup is on top. One day...
Axle size is the diameter of the part that the suction cup slides onto. Axle width is the thickness of that piece that slides on. Shelf height is the distance from the center of the "axle" to the shelf itself. Thickness is the thickness of the shelf.