Mapping rotary control to selected chain’s volume in Drum Rack

I’ve tried multiple approaches and searched this forum, but haven’t been able to nail a solution yet.

I want to be able to map a single rotary control on my midi controller to control the volume level of the selected chain in a Drum Rack, so that as the selected chain changes (e.g. because Autoselect is enabled on the Rack and I’ve triggered the device in a different chain) the same rotary control can be used to change the volume level of the newly selected chain.

My objective with this is to be able to play the many devices in a Drum Rack using my midi controller keyboard, and use the same rotary control to adjust the volume of each device in an A/B/C… fashion. I think this would make it a lot easier to equalize the levels across the various devices than trying to click into the chain menu of each one, especially since the Live GUI has a tendency to jump randomly when clicking around in a Drum Rack.

Any ideas?