Is anyone using a hardware/software controller for drawbars on PSR S series?

[stevehdj]

I am wondering if anyone is using either a hardware or software (tablet app) controller to adjust the drawbars on the PSR S series.   I see in the manual that they can be controlled via sysex messages but do not see any control change programing that would be available.   Unfortunately my simple mind gets confused when trying to program via sysex,  especially with multiple commands as this would involve.