Convertible Pencil Rocket (Parametric)

Update 12/1 - v1.1 See below!

When I was a kid and bored in class, I used to pretend my pencil was a rocket launching from my desk. Now, don't get me wrong here -- I'm not trying to squelch the imagination of any little kids who dream of being astronauts some day; I'm just trying to help those pencils fly a little straighter so they actually stick into the ceiling like they're supposed to.

So what's this "convertible" business all about, you say? Well, that's the real beauty of this design: When the teacher comes walking by, you just set the dart -- er -- the pencil down on its fins and explain that it's a space-saving pencil stand. "Rocket fins? No, don't be silly Ms. Fields -- it's just a pencil tripod!"

This is NOT intended to turn a pencil into a weapon of any sort. That said, I bet this would probably make a great weapon of some sort.

The OpenSCAD file is parametric in case you need to tweak the sizes. I fiddled with it until it sliced nicely with 2-layer-thick fins