Endstop Accuracy

So it turns out using an end switch actuated by a spring loaded screw is not the most precise method of setting your extruder in the home position, upon watching people mount hall effect sensors actuated by magnets, or ultrasound proximity sensors for both bed leveling or as endstop (even saw a guy using a laser measurement system in his extruder) I clearly saw how overcomplicated we make our stuff.
So lets keep it simple, for me, you, and every one who does not have to time to draw and etch a