pcb mount type ones with plastic barrel so barrel bends and pins break when they try pole vaulting over the guitar lead.
I replace them with upside down tagged ones (plenty of give in the wiring then), but require awkward insulated crossing-over and under of the additional wires from tags to pcb. Only realised today that for high quality (proper contacts) Cliff type ones anyway. Its an easy job releasing and removing the metal parts and replacing on the opposite side of the barrel and then straight runs of deliberately slackish wire into the pcb
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on
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