Yeah, torch soldering really softens up ear posts.
Twisting the ear posts to work-harden them is a really terrific way
to stiffen up soldered-on ear posts, and is the best way I know of. Do
you have a set of pin-vises? They are really cheap for a set of
them, and they can hold securely all sizes of wire and small tubing.
You really must have a set of these!
After soldering on your ear post with pad, draw a line down the ear
post with a Sharpie pen. Grip the very tip of the post with the right
sized pin vise, and tighten it up good and hard. The pin vise should
be tight enough to not allow the ear post to slip in the pin vise
Begin to twist the ear post by rotating the pin vise with your
fingers. Watch the Sharpie line start to spiral, but feel the ear
post twisting in your fingers. When you feel the metal finally
stiffen, STOP twisting. You must be sensitive to this physical change
in the metal’s feel, or you will twist the ear post right off its pad
or solder joint.
When you have completed the twisting operation, remove the pin vise
carefully, and remove the Sharpie mark with a bit of alcohol. You
will now have one super strong, stiff ear post!