I was previously doing some numbers on the drilling and was thinking about 400 million tonnes as a minimum. That's what I used when I said it could go to $40 (using $3 per tonne and a final resource of 5 times what they've drilled to date- which must be ridiculously conservative).
On the numbers released today I am happy to say that I've underestimated the resource by some margin. Hoping I'm right!!!