This topic answered some of the questions I had about the Leslie rotary effect. I just got my px-S3000 about 2 weeks ago and have been working my way through some of the features I'm likely to use.
I still need to play around with the accel and decel rates as right now I don't feel it's quite right. I'll add that I am used to playing an organ through a Leslie cabinet using a Leslie pre amp pedal so I do have experience with this effect.
So if knob 1 controls turning the Leslie effect on and off what, if any, function does knob 2 control? Curious minds would like to know 😁.