[SOLVED!] coordinate-handedness confusion

[KristyB]

Then we pull it all together in the main blueprint, like so:

In the third image, you combined (A,D,G) (B,E,H) (C,F,I) as the rotator vectors instead of (A,B,C) (D,E,F) (G,H,I), I don't understand why? The documentation shows  [u' = a*u + b*v + c*w + x], which led me to believe that (A,B,C) form the first coordinate of the rotator, is this not so?