400M lbs of Cu per year... that leads to a production rate of about 220ktpd. That would be fantastic. Any calcs's I've used go up to 180ktpd (b/w 120 & 180ktpd) and the higher rate of production always models better econcomics - provided I've guessed the right Capex for each level of production.

You know me, I'm conservative, but I'm using $3.4B Capex for a 120ktpd mine and $4.08B for a 180ktpd (120% of the 120tpd Capex cost) as my base guess at Capex. That still might be a tad low given recent events with new mines.

220 ktpd seems like a big jump from the 100 ktpd from the PFS in terms of the milling/processing infrastructure involved. Input on what that jump might be is very welcome.

I dont' know if I have time to re-jig my spreadsheet in time to change my guess for Darpa's pool LOL!