went out and bought two of the Hillman brass #235 inserts so i could do the "$2 visor fix" and came across a surprise.
my visors sagged but nothing was broken, like there is in the 'how-to docs' file.
after some problem solving i decided that the tiny metal spacers that slide into the brackets that go over the rotating arm on the visor were not fitting as tightly as they would have had they been new.
so i made a few spacers out of strips of copper and wedged them in there (did not take pics of this sorry)
but they dont sag anymore
visor arm, brackets, and metal spacers:
hot glue gun was handy, not one for stitching (looks better in person
):