I had a breakthrough today that has improved my idle 100%.
Maybe i was stupid before - but what i did was make sure the cause and effect of AFR was lined up properly.
The usually awesome logging maps - done in idle mode in the 400-800 cells at around 50 MAP dont display the real picture accurately it seems due to the lag of exhaust gas from what the injector does. It had tricked me into having too rich a cell at 55, 56 and too lean at 45-50 when the car idles on average at around 50. What i have done is look for peaks and troughs and then go backwards frame by frame looking for the corresponding event identified by pulse width peaks and lows.
I then adjusted the corresponding VE cell and it has made my idle AFRS heaps better.