My numpty nominee goes to the person who has the whole shift in on the eve of the millenium to single handedly combat the millenium bug on our whole fleet. Not that any bugs exist.
He too has had a very similar experience with blown filaments but jumped in at the deep end with wiring manuals and schematics and didn`t bother changing the filaments.
Wiggly, rumour is you had a big wing wiring job on xmas eve, any details.