Let me bring something that was beat to death 10 years ago
To some camgrinders the lobe center is the high point of the lobe
To some it is the center of the .050 timing
which with an asymetrical lobe can be quite different
One reason some cam vendors want you to set the icl 8 degrees advanced
BVVC
I'll try and find the links
Racer Brown's article is one of them- anyone know where it went?