Magnetic nesting measuring spoons (customizable)

I liked the design of [kingpop's nesting magnetic measuring spoons](http://www.thingiverse.com/thing:260572), but I already had some [1/8"x1/16" magnets](http://www.amazon.com/gp/product/B0065O63BK) on hand and wanted to use them, so I redrew them in OpenSCAD. There are a few differences to the original:

The spoon bowls nest concentrically.
The bowls are placed with their centers equidistant from the center of the handle, instead of at the end of equal length arms.
The bowl volumes are mathematically accurate.
The default arm lengths are shorter than the originals.
To nest, the center of the handle bump for the large spoon is lowered. I think in the original, the center of the handle bump for the small spoon is raised.
There are no markings.

Most dimensions are customizable.

As in the original version, there are two spoons, one with Tbsp and Tsp, and the other with half tsp and quarter tsp measures.