Found this while looking for info on wiring up HES:
Joystick and Lever Design With Hall-Effect Sensors
White paper from Texas Instruments on design considerations. I’ve only had a chance to skim it, but looks lever useful for the home builder.
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How cool is that? A clearly written, nicely diagramed and thorough document for a $2 part.
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Well, I’ll be… 
Nice find!