MIDI link - I've run out of controller faders

[Castle Starter]

Hi all,
I've used MIDI link off the param FX menu to link faders on my controller to plugin parameters.I'm using MIDI link rather than Learn because I need to be able to scale the movement of my fader to the parameter. For example, if you Learn a link between reaSynth attack parameter and a fader you only have to make a small movement in the fader to make a big difference in the attack time.

But I only have 8 faders and I'd like to control many plugins in my project. Learn lets you set when the MIDI link is active e.g. When track has focus, when FX window is active. MIDI link doesn't give you this option.

Is there a way to link faders using the param menu MIDI link approach which gives you the ability to scale the movement of the fader but to do so for specific plugins at any one time? e.g. Control the reaSynth parameters on one track, the reverb parameters which are on another trac?

Thanks for any suggestions.

Castle