This finger spinning top is made up of only curves.

The fuselage adopts a single polyhedron design, which is constructed by piecing together various contour lines from bottom to top and combined with a customized multi-point inlay algorithm.

It allows for quick rendering

If you want to create an authentic finger spinning top, make sure that l1 = l2.

The STL files uploaded are just for demonstration purposes. You need to print three parts separately: the body, the upper cover, and the lower cover.

Update 1: Added the bhh parameter