Hello, I can't happen to notice any change in the attributes values when I check the toggle of the fit_01 parm.
What attribute is it supposed to have effect on?

Hi,

The parm should have been named “Fit To 0-1”, and is remapping the range of both concave and convex float values to 0-1. As for what it controls, it drives the switch10 node inside. Check out build 1.172 to see this working.

Paul

Thanks for the information and the fast fix
cheers