I launched a second Viper and 'tried' to make a more efficient direct burn and eventually ended up with 15m/s extra delta V when landed right next to my first try. I actually ended up doing the same maneuvers... but dipped into Kerbin's atmosphere a bit and lost a little part of the wings... I can't do gravity slings, skills too low. If a pro were to fly my plane and use gravity slings or something else than pushing buttons in Mechjeb until something sort of happens, then they would make it all the way... but I can't! XD I also got a third Viper to Laythe with 3570m/s^2 delta V left on the nukes (or 12,000 with the jets) after flying around the planet to find a place to land... in the middle of the night; wasted a lot of fuel. Then tried to get in orbit again, only to find it being 50 degrees eccentric because I ended up having to land close to the north pole to find land. Then I tried to escape Laythe's gravity, only to be caught by it again a few minutes later and crash landing in the ocean again. I seriously need to go to special Kerbol Training Classes... Now Jeb, Bill and Bob are all stuck on planets. I can guarantee that I can get it to Duna and back, but where's the challenge in that? Well... I couldn't do any other planets so far yet, so I better be off to do that! Anyone can give a try if they want! Just show me how far you got! XD