Ok, managed to try the minimal voltages and found I had a few magenta pixels using the combi pattern 2, so I upped 134 by 10 and they have disappeared, also nothing present in the 72/75vs either!
I now have a faint greyish glow on 0 stimulus, (when my eyes have got adjusted, otherwise it's very black), however it is not uniform, (probably due to wear) as I have a few minor "darker small blotches around the edges and a darker around 1" ish band around the middle about 12" long, these are minor/faint as you can only just make them out line + blotches and were slightly seen when at default voltages anyway, just a bit more pronounced now, looking at the display in a pitch black room.
Any light in the room the display is pitch black
I'm quite happy with this as the mll is much lower than before
Suggestions to tweak this further?
Update, seem to have a little bit of image retention.