I started by using my 7D and went thru 5 of my lenses which I had adjusted using the Lens Align tool.
I did my 15-85mm zoom first, I had trouble at the wide end, but I was too far away, 4 or 5X more than the 50X focal length that Canon recommends.
Here is what I saw.
15-85mm ma= 0 (was -4)
Tokina 17mm prime= +4 (was 0)
Canon 50mm 1.4= +4 (was 0)
Canon 100mm L= -1 (was 0)
Canon 135mm L= -10 (was 0) - the curve on this lens showed high resolution from ma of -14 to 0 and then went straight down, a strange curve. I ran it 3 times at different distances with similar results.
That's the problem with MAF, in my experience.
Whenever you try a new method, you get big differences from the previous ones and it is very difficult to get in the real world ultimate evidences that the latest is working better than the previous.
My latest attempt was with LensAlign. I spent some days tuning up my kit (two cameras, 4 lenses), paying the maximum care to alignment etc, getting, time by time, contradictory results. At the end I opted for the ones 'seeming' to work better in the real world, by I'm not sure it was just a psychological decision, since every previous method gave me a similar decent satisfaction. Now I stand on the last one I got with LensAlign telling me that this is ok...