Not sure on that, but is worth a try.
That is one hurdle I had to work on. Unfortunately, the drawbars are set in stone on CC#. I also had drawbars popping out full when I used the same number for another knob or switch. I finally solved the problem by using the “beautiful” Cantabile filters.
If you are using a sustain pedal for fast/slow, there is a setting for it within B3-X. If you are using an expression pedal (or volume pedal) you will need to use the filter on it, and on your keyboard(block midi cc20). If you need further help, I will review my rig, and give you details. I made a rack for B3-X that includes bindings for drawbars, and other settings. But, it is geared for a particular keyboard and foot pedal.
P.S. If you are using a volume pedal to adjust Leslie speeds, you might want to re-think it. Speeds can be set within a rack or song. I wouldn’t change Leslie speeds in a live situation, just because it doesn’t sound natural. Every Leslie is different, but with the clones, I know what I like, and what sounds natural to me. The default fast speed, for me, is too slow, so I set it to about the 1 o’clock position, or a bit faster. Same goes for the slow speed. This, of course, changes when I am trying to emulate a certain sound. The volume pedal should be used as an expression pedal…very relevant to the Hammond playing style and sound.
I am also posting this to the VST Organ thread, for others to see.