Hi, first I want to say great mod. I've really had great fun with it and it made me consider missions more carefully than before when a rescue mission can be done anytime I want.
But I have a question regarding the training mechanic. I saw that there is both TRAINED_PART which is for the crew module part and TRAINED_VESSEL. Does TRAINED_VESSEL matter in terms of stress reduction or is it just trained part?
Reason I ask is because I noticed that if I rename a vessel it starts tracking on a new altogether from zero. So if I have a Kerbal that has experience with a certain rocket, next time I launch him with the same rocket I have to keep the same name in order to keep TRAINED_VESSEL high without re-training .