Hi, Wasn't following this one "real-time" but there is a useful trick used on
aircraft instruments wit soldered cases. They put a ring of tinned copper wire
in the joint before they solder it, leaving a "tail" sticking out. Next time
you want to open it, you just pull the wire out (cold) and it brings the solder
with it. It also provides a good surface and heat spreader when you are
soldering. The aircraft cans have space left for the wire, but many pressed
cans have a radius that helps or push the end in below flush.
Robert G8RPI.
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