jd5live.....

The picture I have in my head is a little wheel with a band of some kind attached to whatever, that turns the tempo indicator that I turn with my hand on top of the KB....

I do not speak any form of electronics.... have no idea what a rotary selector might be other than it does sound a bit like my picture.... as for a pcb???? I have not a clue what that is....

Anyone else have any suggestions???? Bill? Roger?