Had a close look at the huygens diffusion and QRDude scatter drawings for 1D normal / inverse pairings and realised that the substitution is not on for those combinations.
For the 2D panels, which are not generally modulated with such pairings, but use rotations of a single panel geometry, the substitution is still up for grabs...
Here is how a modified QRDude would generate the 2D inverse panel from the previous post... note it's now the same as the commercial panel: