I have a Gator Frameworks sustain pedal with a polarity switch. It works fine on my other keyboard, which is a Nektar GX61.
I have tried absolutely everything to get the GFW sustain pedal to work on my Kontrol S61 MK3.
I’ve read the NI page “How to Configure Sustain/Expression Pedals on Kontrol Keyboards”.
It just will not work!