Toilet flush handle seized on my 1950s-ish bog. Tried to free up with wd40 and a wire brush, no dice, tried to unscrew the nut holding the whole assembly to the cistern to either free or replace. Realised some doofus already tried that probably about 20 years ago and f**ked it up entirely. Now it's loose in the cistern yet simultaneously stuck there forever. Whole new toilet required. I hate plumbing too, especially on old sh*t.