Implicit Moai Necklace

A Moai Necklace inspired by \"Moai Necklace by open3dp.\" http://www.thingiverse.com/thing:1986 It was modeled using SAGE and Implicit Solid Modeling. The horizontal holes were designed with pointed tops and should print on a RepRap style 3D Printer.

The Scaled25 is bigger than the Scaled10.
The Straight version is the one with straight sides instead of curved ones.

I have now added the equation, in a txt file, that describes the surface and a txt file version of the SAGE script that ge