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in an airoplane they never solder joins they always crimp
solder brings alot of heat into join and right after the join where solder ends
it becomes brittle
now most solder joins i see done by others are always overdone
just need minimal solder and minimal heat

anyway soldering can be bad due to very thin wire can break due to vibrations over time
right at end of solder in a car its not so bad
in a plane well u can end uo with 300 deaths and thats no good heheh