Even aside from that, the book could have used an editor. It's hard to follow what he's saying, and this is only a few pages. So wait, there are two books? He keeps referring to a "drawings" book, as well?
Constantly referring to other systems in the book
and the drawings book, every system seems to be a five step process, minimum, where you consider the points on 4 rails, plus the angle of the first two balls, good god, I hope there's not a shot clock when you're using these. I don't see how this is practical for 99.9% of players.
Imagine doing all these calculations and then you get a kiss on the shot after all that? I'd jump out the window.
I posted this on another thread, this is the best systems book I've ever found
https://issuu.com/serralta/docs/sistemas