Nice thought, but I'm after realism really... Well on the way so far with Jim's fantastic effort so far... Just need to figure a way to connect it to the game so it works...How about a 4 position rotary switch and two momentary buttons
The 4 positions would be
OFF
Run Down
HOLD
Run Up
When the switch is in the HOLD position, then the two buttons implement the Notch up and down functions.