Ichinin 
✅🎯🙄So, easier to make SSTOs with a full tech trees. The dedicated dual mode engine that can flip from Air Breathing to Closed Cycle makes it a snap.
The only challenge at this point is to determine the point of much fuel of each sort (LOX + Liquid Fuel) to bring before it becomes inefficient. Oh yeah, and to identify drag (the Red lines in the picture with flight dynamics turned on).
Anyways, unsurprisingly the flight went well - as always for this Kebal vet. End result is one 4 slot (2 x 2 large bays) cargo bay so it can haul REALLY BIG cargo up into orbit.
