thiru wrote: Fri Jul 19, 2019 8:33 pm

just curious, have you looked at the blau tvi here;
viewtopic.php?p=1295357880#p1295357880

sounds similar to me... may be I'm wrong

Thanks for the idea.
But, as picture, it´s not exactly the same….
And I think it looks clear why the 5º color request, and the visual help with slope.