I am emulating a throttle handle from a locomotive. See the diagram below for what I am trying to create.
Its a throttle handle with 9 'positions' or notches (0-8 power).
The handle will probably pivot on the potentiometer.
I need some ideas on how to create mechanical notches, so it clicks into each throttle position or the user knows when they change to a different position. I cannot find much inspiration on the web, as other similar systems seem 'sealed'