I wouldn't try to improve it; it's a good system as is. But hyperbolic claims like "he has identified shots that occur 75% of the time" aren't factual or helpful. All Joe has done is evenly divide the usual range of cut angles and described a useful way to use the divisions. I respect the fact that he doesn't claim any supernatural powers for his system and wanted to point that out - it's not that common in this subforum.
pj
chgo
Then what would YOU estimate how many shots or cut angles Joe's "training balls" cover when used for either a right or left cut from 1 degree up to about 88 degrees.
There are those who use contact point aiming for 100% of their cut shots and do claim it's the best aiming system in existence.. What are they doing differently to fill in the gaps to make the other % of shots not covered by the marks?
If anyone should know it's YOU since you use contact point aiming. But even if you didn't you'd still know because you know ALL systems thoroughly.