So, where is B deck? Immediately beneath the bridge? Why would that be a good place to sabotage the impulse engines from? If it's some place closer to the impulse engines, then why would it be called "B deck"?
Also, the WNMHGB reference... does it have to be "Engineering Deck 3" as in the third of several Engineering Decks, or could it be "Engineering, Deck 3" as in one of several Engineering stations, one of which happens to be located on Deck 3?