Note, TD is using the LOM (life of mine) avg of only 8.2 grams/ ton for lower level in D shaft. (also only 9.3gm LOM for upper D shaft)
See the recent news releases and the grades are much higher than 8.2.
TD is working with some very concervative numbers.
The proof will be when some of the 15 stopes hit the mill real soon.
cheers