sorry for digging up old threads but I figured for anyone else who drops b here, I would point out that Roninpawn landed a helicarrier on the VAB after several attempts at touchdown resulted in the building breaking apart. The only differences between the success and failures seems to be the speed in which he landed. There could be a weight difference in the fuel he had left (He didn't have the meter showing for the successful attempt but the bar in the staging was about equal to that in his previous attempts.
