Hi,
I have been poking some more at the HSV Clumping thing which is turning into a fascinating and great exercise, so here is a graph showing the required offsets at different level of saturation:
The underlying curve varies with the compression threshold and goes from an almost pure parametric sine wave with a threshold at zero to a quadratic form when the threshold is closer to 0.
I will continue zipping into the rabbit hole 
Cheers,
Thomas