@xenon:
That's so odd, because in my game, she wouldn't give Audrey the wrench without the receipt, and I finally had Audrey tell John the situation, and John went to Dr. Oswald and made up a lie about the radiator in his office and hey presto, the wrench!
This actually sort of reversed my feelings on the game from arrrgh not one of these to this is clever as hell, because it'll be interesting to play a game in which communication and information sharing between the two leads is so important and puzzles might have multiple solutions depending on which lead approaches the problem!
Thanks a lot for the quick assist!