When using either Gray_curve or K_curve you can still fine tune the curve with the Linearize= inputs. This could be done even before the new LinearizeQuad droplet Roy created.
If you do use this new droplet after defining the K_curve and Linearize= settings then you basically have a three step linearization process. That might be overkill with a single channel black only profile, but could useful with Eb-6 style profiles.
Richard Boutwell
www.bwmastery.com