Yeah, I composed it completely wrong. This is actually a pretty aggressive crop! The original frame ends on the right edge of the cropped frame, and there's a whole bunch of worthless crap off to the left. This means I cannot place the girl and the ducting where I want them in the frame, without going to an absurdly tall format. I might try that out, actually.
I didn't "see" this shot properly until I was looking at it days later.