I made it! I started to play the demo first too, and damn i dont reached the mün whatever i did (or an orbit what is it? =) In fact we lost Jeb in the name of =science= but we build a masterpiece of rocket in a strange mood, capable to reach the mün (straight!!), fly save to kerbin and land. This was my demo experience and i wanted more so i got the full version craft of my demo rocket, im proud of, and very happy it works in 21.1. http://pollix.de/ksp/in_memory_to_jeb.craft