another way is, to deal with multiple widgets,
AND: to work with the curvature feature.
in this case: use three knob widgets, controlled by one HW control.
The point is to setup the curvature (min-max) accordingly.
personally i work by using the “mute-buttons”, instead of solo.
Just create three segments over the full swing of a knob, vs. how your curvature has to look.
here is a tipp thread vs. a dual crossfade,
it has also the quad switch patch.
check the screenshots i posted and check post #4 in case your interested in this solution.
it will give you the whole idea, how to setup a curvature accordingly.
it incl. gig files