Just an idea I had now, a check button for inverting the signal follower output. flipping the sign on the rate of change probably sums it up. Don’t know how it’s done internally, so it’s probably not as simple as I imagine it 
Set the destinations min to max and max to the min. This will invert the applied range.
yeah, it had to work that way, otherwise, wtf to do when sliders are inverted?