I've mostly been building passenger spaceplanes so far. But I do have this I can share, the low tech "cargo"  "SSTO"  I built for my spaceplanes only playthrough of science/explore. It uses Swivels and Wheesleys, so only needs "Mun Landing" and "Light Aviation" to build the plane. 205 science total I think. It's so low tech, it was the first vehicle in the playthrough I took into space or orbit. Though the payload shown here was a later one, a Duna/Ike /Eve Flyby Probe, and also needs "Long
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