I'm not a fan of it tripping down an empty elevator shaft. But, its exit point does not line up with any engine room placement we've discussed so far, either; it's very far forward. The room would have to be reversed, and jammed up to the deflector dish with a FP pipe cathedral extending into the dish guts. We've seen this before: Kirk's Television Enterprise Deck Plans WIP For this thread, I'm a non-FP pipe advocate, so, I'm not a fan of this placement, either. So, the Pin Wheel needed to have wandered around a little before deciding to leave for good. Option 1: It popped out of the engine room in the secondary hull, moved through some of the corridors/walls then left. Option 2: It popped out the engine room in the saucer, moved through some corridors/walls, tripped down the elevator shaft, moved through more corridors/walls then left.