Follow up, got the head back from being re-machined. By my verniers the squish with a .5mm base gasket was 1.42-1.45mm. The tuners verniers gave a reading of 1.35mm. 1mm was shaved off the gasket surface which should have given a squish of 1.25mm. By my verniers the new squish is 1.33mm. Close enough
Threw in the tuners recommended specs based on 14's he has run on the dyno - 40p, NECJ#3, 168m. I erred on the side of caution and left a 170 main in, down from the 172 I had been running previously and had been happy with.
Surprisingly the bike is happy running a 40p and J diameter needle, air screw is set at 1 turn out. Previously it would not have liked this and the air screw would have been at .5 or similar, so the closer squish has helped.
I only rode for 30k's at the test track I've found nearby (thanks to whoever it is cut that in), avg temp 14 deg C, altitude of 350m, humidity between 80-90%.
As per usual whilst the bike had a good idle (which got worse as the day went on thanks to the approaching rain storm and skyrocketing humidity) and then broke up burbly and rich immediately.
Today was a bit different too in that the top end wasn't as good as I remember, at the start of the ride when the humidity was lowest (though probably still at least 80%) it struggled to lift the front wheel under power, as the day went on and the rain came in it seemed to get better but still not as good as it has been. Not sure if I'm rich or lean, more testing will reveal the truth.
And as per usual economy was ordinary - 3.4l used for 30k's = 11l per 100km.
Not good enough
http://youtu.be/1gbScbv_1Ew