Got that wrong about the W dimension (width) always being on the 96/48 axis.
Yes, in my experience the width measurement is nearly always in the 24/72 dimension. I found it odd that the Grand Master design was 96/48.
most competition stones are measured from flats and not points
Actually, without doing an exhaustive study, I’d guess the opposite is true. Even the common SRB is a point-to-point measurement. In this year’s SSC, only the novice stone is measured from flats.