How common is this, I've never seen a pot like this? the wiper that covers
the conductive ring is worn down to 2 disconnected stubs and the triplet one
covering the resistive track very worn and one wiper soon to break through.
Spindle/ bush is noticeably worn also. Curiously metal and conductive tracks
are scored but not worn through.
2 year old trolley but owner does 2 rounds of 36 holes a week. So say
100,000 rotation limit in the pot specs then requires an average of 7 starts
and 7 stops per hole to reach this specced limit.

Coincidence , I note message on pots just preceeding my one

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Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/