"Im not on steroids right now"- good laughs out of that.
Wouldn't use letro to "cut water"...it cuts estrogenic water by lowering blood volume, if your at a stable blood volume level i would personally stay away from screwing with yourself OFF cycle just to cut some water for a photoshoot.
diet sounds on hand, if you can be 200lbs & 8% and less than 6 foot tall, you seem like you know your body enough to handle this on your own.
Just my .02.