Hi Dave
I sent a P120 to Jetcat USA a few years back for a service. I received it with the same issues. I was told the bearings had been moved somehow in transit and I needed to continually turn the turbine to allow then to seat again.. I seemed to work after an hour of manually turning and very sore fingers. I flew it for a further 10 flights then it stopped rotating completely after a start. It was rebuilt by Jetcat EU.. They stated some anomalies post service but would not elaborate..