Ahh...Kirk Franklin, I am familiar! Nice. Yeah that's a stock Gospel B3 for sure.
Something strange, until now I haven't actually tried recording with the Leslie, and when I did just now, it seems the automation for the rotary switch/FX isn't getting recorded. So when I play back the recording there's no Rotary FX in the places I flipped the switch to Fast, it just plays as if I never touched the modwheel at all. I checked to make sure Automation Read and Write were enabled on the plugin window, still nothing.
The only thing I can think of is it's either I have to try switching the configuration to "configure as synth", or maybe the Midi Event filter I have on DimPro B3 organ preset that I used to cancel out the DimPro modwheel data signal is somehow affecting things. Not sure on this one.
**UPDATE: I just tried using the VST2 version instead of VST3, and that seems to work consistently. The Automation Read and Automation Write must be on, and as Simeon mentioned earlier, the Leslie also has to be in focus during recording. I also see that written Automation graph shows up over the track whenever the Rotary Switch was used. I was also able to bounce the track to audio, and it keeps the Rotary effect in tact in the mixdown. I have not tested this extensively but so far I've had success with it.