OK, Bay doors are now implemented, also it is now UMMU compatible (My first UMMU compatible add-on, Yay!).
Next to come: Hatch & ladder, followed by EVA on pressing E
The main engines doors can stay like that, but I just dislike the small structure on the aft end behind the doors... should get toasted when we want to transit from vertical liftoff to horizontal flight without cutting the engines.
BTW, on the main engines, my suggestion for the internal model: We use a fictive He3 fusion engine, which can reach the desired 3.5G peak acceleration by injecting RCS/OMS reaction mass into the chamber (lowers ISP, increases thrust by chamber pressure).
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Hatch & Ladder implemented. EVA in development.
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OK, EVA does not work, because it does not keep the crew. Will look at this later.
The structure at the end is now gone, was very likely caused by the double mesh and was not noticed to be gone during the testing.
Problem: The central hover thruster is not really useful, this could be removed. Instead, stronger thrusters at the nose would be good. We have to compensate 2.3 MNm torque by the main engine when lifting off from Earth. The two upward RCS thrusters would have to be 86 kN strong for countering this - that is pretty strong for the size.