[trumaestro]

I have a similar machine. I doubt you could reliably set one up to actually hit jacks. Using one of these also kind of overwhelms your nerves/muscles. Meaning you can't really control the muscle while the pulse is going.
I don't think you can generate the actuation force needed for most keyboard switches by using one. Even if you could somehow hold down keys just enough to barely need to press further down to actuate, you still can't control it well. You'll get random misses and have a larger potential to hurt yourself by using it on both hands.

Very bad idea imo to use it while playing

But I have found it very useful in its intended purpose, to help with pain I sometimes get in my wrists/knee. Whether that counts as helping with vsrg gameplay idk