A few hours of measuring, re-measuring, ripping up everything when you realised the connectors were on the wrong orientation and reworking I get:
Joystick1.2.jpg
OK I am happy with this! Onto the lower portion which should have the world's most boring schematic. To wit, exactly 1 pin.
Chesh
BTW, has anyone else realised that with the Shottky diode trick, there's
nothing stopping us making a full mechanical keyboard using Cherry MX style keys?

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