I like the idea of starting out by using tiny rockets to get science, instead of wandering around KSC grinding out experiments at the mini-biomes.  Some observations: All of the solid rockets have the same Isp curve (140 -> 165), contrary to their descriptions. Also they all seem to produce more thrust than required, to the point where it's possible to stack several of the same stage and keep total TWR well above 1.  The aerospike is surprisingly good on paper compared to st