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 sy*** messages but do not see any control change programing that would be available.   Unfortunately my simple mind gets confused when trying to program via sy***,  especially with multiple commands as this would involve.