This provides the easiets, most open-source way I've found to take your RockSim design (or a pencil sketch for that matter) and break out all of the prints to be 3D printed.

The Fins and the nose cone are the trickest to convert. There is a step by step process for each in the Variables.scad file.

TODO:
Add support for multiple fin sets
Add customizable mass in nose cone tip
Fix nose cone wall thickness issues
Coupler center mark causes slicing issues
Add w/t variable