1. Create a slider S with your specific CC
2. Create a super control Toggle button TB.
3. Set TB to Send On Only
4. Set Midi Off - On to 0->your default value for slider S.
5. Repeat steps 1-4 for as many sliders as you want.
6. Create a momentary button MB.
7. Make the toggle buttons sub controls of momentary button MB.
Now you are ready to go.
When everything works correctly set the toggle buttons to Hide In Performance.