FlySky FS-I6X - Blend for Max Forward Speed

[cooker2003]

I would like to use one of the dials (VR-A) on the FS-I6X controller to act as a maximum forward speed limiter for my throttle channel. Tried to get this to work a bit but not all that familiar with this controller or how to setup mixes.

The way I'd like it to function is that when the VR-A dial is turned down, the max forward speed of the throttle channel would be 20%. If I turn the dial up to 100%, I would like the throttle channel maximum forward speed to then be 100%. Has anyone done this and can you give me some tips on setting up the Master/Slave relationships and positive/negative offsets?

Thanks!
Dave