Big Flaky Rocket

This model of the Tintin Moon rocket is a remix of [Pierre Muth's work](https://pierremuth.wordpress.com/2018/09/08/destination-moon/) (which was inspired by [Gregory Vienot's version](http://blog.gregory-vienot.fr/fusee-tintin-objectif-lune/)). The rocket shape comes from the Pierre's dxf file, I "ported" it to OpenScad (with minor differences) using [this splines library](https://www.thingiverse.com/thing:1208001) to be able to work with it as I wanted.

The goal of this version is to provide a lightweight assembly based on individual tiles to be able to print it at a large scale using as little material as possible. The provided STL files are for a 50cm version weighting about 130g.

The design is made of a thin shell of twice the 0.4mm line width plus the legs which can be printed with a single perimeter and no infill, and the parts just clip with each other with hooks and notches, which have a fixed profile dimension independently of the scale. The OpenScad source file should