Possible to Link Volume Boost and Cut?

[clbraddock]

Is there any way to link two volume controls so that boosting one results in an equal cut in the other?

I’m wanting to boost volume going into an outboard insert while simultaneously making an equal cut following the insert return. Basically to drive the outboard hardware without actually increasing volume.

I know I could do this manually with a plugin before the insert and another plugin after the insert, but was curious if there was a single knob way to do this?