Ann: Operational Update, page-14

Don't expect big tonnages/ounces from air leg production. A good machine miner can achieve one cut per shift with a portion of the broken ore requiring bogging to compensate for the swell factor thus maintaining a constant working height from the face. If the ore is grading 15 grams (half ounce) and the miner is breaking 20 tonnes per shift then expect 7.5 ounces less recovery loss. All ok if multiple headings on the go to provide volume.
Nevertheless the current management are heads and shoulders above the previous mob.