hi:
i don't do the selenium step, but i fix as the paper / film manufacturer recommends, WITHOUT HARDENER
do a small rinse bath > permawash
and the amount of wash time i double - and do "fill / dumps"
- have paper back to back/ face to face shuffle through a tray of them - dump & repeat -

i submit work to the federal gov't ( USA ) and they check each print/negative batch i submit ...
- i've been submitting like this since 1992 & haven't had any problems ( KNOCK WOOD!)