I've been experimenting with partial vessel control in post KSP 1.2 release, and haven't had much luck overriding it. I've tried setting Vessel.maxControlLevel to Vessel.ControlLevel.PARTIAL_MANNED, and tried implementing ICommNetControlSource, and returning VesselControlState.KerbalPartial from GetControlSourceState. I've even tried setting Vessel.maxControlLevel during the GetControlSourceState call. When the part also has a ModuleCommand, neither approach overrides the vessel control state; i