That’s about as fast as i can go.
I still believe some people have this extra thing going on ( whatever that is) to make these ultra fast motions.
How hard we “nomal” humans try, we will never get this ultra high speed going on.
A friend of mine can do this ultra fast motion pushing u button.
We tested this with pushing the button on an old sampler. He could do it ultra fast, and how hard i tried (even after practicing for months) i just could not come even close to his speed.
Also on the guitar on a single string with no left hand fingerings he can reach speeds almost twice as fast as me.
Inplay for over 30 years now and my max speed on a single string is the same as when i started. Only thing that has developed is keeping time and crossing strings faster.