Thanks Max,
I just applied your method to my own cal.
The only thing I'm not sure of is what the upper limit should be set at?
The original tune with the 116L tank is set at 150.
Mine has the 159L tank and the upper limit is a possible 255L. I have set it at 200 for the moment but I don't understand it completely.
Maybe Ross or Paul can chime in on this one?