Does this prove David Vizard's 128 lsa formula ?

I get that as long as it's degree'd it should be fine... i just worry about everything and being 6* off was just bothering me, wanted to know if it is a known thing that happens is all :)
I recently degreed a cam with a cloyes timing set.
It was of 8 degrees retarded Dot to Dot.
I called cloyes, the guy said they are aware of some sets that were marked and keyed wrong.
He would have replaced it but I just made it work ignoring the advance/retard marks.

(It actually took putting the crank gear on one of the retard keyways to get the 4 degree advance centerline I wanted.)

Just one example of why you need to degree any cam.
Do not trust just lining up the dots.
Stack Tolerances between the cam and timing set can change a lot and
QC isn't very good these days...