Hi Volker - from small things....That's exactly how I started with astrobasic. In fact, I was able to find a little bug in one of the scripts that Jean was able to fix, and then I thought about learning the script. Anyway, it does take a lot of time, but I'm not a professional coder like Jean, so I understand your view. Thanks for your on-going interest in all things Planetdance.
Best wishes. Ed