Well I finally got around to checking and updating the PEC on the Mach1 as I haven't even used it yet - I know why now . Its had a bit of time to settle in so I thought I would do a Pempro run . The pre programed PEC was a total of 5 peak to peak so I thought thats pretty good . I ran 7 cycles to do the new curve and came back with a peak to peak of 3.9
I was pretty impressed with that , so corrected its probably < 1 or bugger all .