If they could develope enough stopes above 26 level, could they not then temporarily decomission the D winze in order to sink it another 1000 feet deeper. This would save a lot of diesel moving ore up those spiral ramps from the bottom of the current mine workings. Developement and extraction of ore from the Deep West (high grade) would be a lot easier and cheaper. It would also make working down there a lot safer with the additional access.