Mapping the MPC 4000 MIXER FADER

Has anyone been able to Map the MPC Mixer faders to an external fader Controller? If so, would you mind sharing the process? I would like to control the MPC mixer fader with something other than the Qlink Faders.

BUMP!

Im looking to do the same with the 5000.

Tried it so many ways, the MPC 4000 see the fader movements and I can change some parameter. However the within the mixer section, I have not made any progression.