I looked at the SEA deposits next door to Treaty Creek to compare to the size and grade of Goldstorm defined so far. The closest deposit is Iron Cap which looks similar in cross-section but there are important differences.

First Goldstorm then Iron Cap:

It's a limited sample, and Goldstorm will need a lot more drill results, but the grades are looking better at GS. I estimate GS could have the same rock volume of IC if the infill drilling works out. IC will be mined by block cave but GS will probably have an open pit with block caves undeneath, similar to the Mitchell deposit. The M and I for IC sits at 5.6 million oz AU so we have a good shot at reaching that number.