Here's two setup, each with two organs, a kb3 and a vast, both drived trough a double leslie effect (The double leslie 10). The kb3 is on the upper manual.

On the one called DOUBLE, the leslie speed can be controlled by pulling up the PitchWheel andor with the Sustain pedal.
On the one called DOUBLE2, the leslie speed is controlled by the switch button.

I hope i can do better next time, i'm trying to create a "real clone" with two manuals on the PC3.