I have tried all my 9 Canon AF lenses (ranging from 17 to 800mm) and ended up with micro adjustment at or very near 0 on my1D4, they also focus just fine on my other EOS cameras (5Dc, EOS3, EOS 33V and EOS 50E) am I just lucky?
I am not questioning that micro AF adjustment is not a great confidence builder, just saying that I have not found a use for it - except for confidence building!
If you were using a yard stick and duck tape like the OP then yes you are lucky.
Maybe so, but having said that within the small circle of photographers I know well (including 1 pro) none of us have used this facility on any of our lenses to the best of my knowledge. The only Nikon shooter I know well has not needed to use it either. The cameras in question are a 40D, 5Dc and half a dozen 1D Mk4s, lenses are nearly all Canon (mainly L series) from 16mm to 800mm, sorry I can't remember the details of the 2 bodies that our Nikonian friend uses. I have also had no AF accuracy issues with my EOS 3, EOS 33V and EOS 50E - I must be really lucky!
P.S. the only camera I have used the Yardstick method with was my Leica IIIg - still spot on (within 1/2 inch or less at 6 feet) after all these years with all 3 lenses and has never been serviced.