I use 20 ga, dead soft, solder it on, then twist the stem to work
harden. If the stem can’t be twisted due to the earring design, I’ll
carefully tap it on my anvil w/ a hammer. Next I cut a groove for
the nuts to grab on to, then put it through the tumbler w/ mixed
I’ve never had a problem with posts being too soft, bending, or
giving in during use.