With 508 lbs. of concentrate made up of Au, Ag, and rock dust, produced in 20 days, the remaining time from early June to now , means we have 5 times 508 lbs.
They were only running 1 shift at the beginning and they were supposedly doing a lot of "tweaking", so the math does not support this being over the first 20 days.
IMO 508lbs is all they had up until October, when they prepared the shipment/wrote the PR... This topic has been debated in previous posts...