P.S. I looked harder at your labeling system. I think you see 3 columns, each with a grid, and then you label within that grid. When I look at this puzzle, I see 15 columns and 15 rows, one large grid.
FWIW, I use programming pseudo-syntax in notes for myself, with long lines for relationships with a delta on the line, so I might write something like:
Which is way harder to type than to scribble