When inspecting the bearings I found that the front bearing was in excellent shape but the rear bearing was very sticky like it was gummed up. I cleaned the bearing out in situ and put a drop of lube on it and it was nice a free again no tight spots or any sign of damage.
I am using Jet A1 mixed with 4% synthetic two stroke oil (Castrol TTS) whereas when running with the two piece tail cone I was using 3% castrol TTS. It looks like the oil was gumming up the rear bearing, also the shaft tunnel was a very very tight fit in the NGV and had score mark on it where it was such a tight fit. The other thing I noticed is that the CC is not attached to the diffuser like on the other "turbine" which is why I had a lot of difficulty changing the glow plug as the CC moved once the plug was removed[:'(]