I would have to agree with you at this stage (ver1.15) the greatest thruster you have can handle 5 fuel cells at 2.5 mass each and a glorified 3 stage rocket still has a bugger of a time escaping earths gravity well, which considering anything more expansive introduces crap-loads more drag as well as cataclysmic complexity to the build means there\'s currently some major balance problems. I mean explain why the rocket pictured should have problems getting more than a 3rd of the way to the moon? It has very low drag, the stages are balanced to continue the necessary amount of thrust to continue an increase to acceleration, it\'s re-enforced enough not to shake itself out of existence.