Cupcake Tailfins

Here's the deal: I've been reading a book called "Cadillac Desert" - a good book, but not relevant to this Thing except that it brought to mind the word "cadillac". I've also been working on this:
http://www.thingiverse.com/thing:7641
which is based on the cupcake platform, and cadillac + cupcake leads inevitably to cupcake tailfins.

In this instance, at least, the mysterious process of inspiration has been documented. Anyhow, I'm also working on a version of this with integrated 5mm LEDs in the place of taillights - probably with a battery. More on that later; probably after I put more work into the x-gantry.