I agree with most of your comments adam.s but I think the 1bt is misleading now.
The company states theres 1.53bt of upgradeable resource at an ave.42.4% fe plant feed with mass recovery levels of only 36-39%. That is only 600mt + the 100mt of DSO.
Im certainly not trying to get technical here but realistically BRM have 700mt of DSO equivalent product.
Still an impressive 20 - 40 yr project!