its become more of a bug and i think its a bug in code....i have found out, that wenn i can change the techtreenode some of the part become doubles... i would only test the rendevous part and have change the rockettree. The doubles i found are Propulsion control Module, Orbital Manouver Autopilot, The Orbit Autopilot and Orbital Match Velocity Autopilot. may they are still more. After this i try to test the system... but i have troubles in Launch (engine Shutdown) and by rendevous. After this i become mad and now i think the idea is great but it need more time for tests an bugchanges for stability. For now i let do your work and hope to enjoy this mod for later.Thank you