I'm still crushed and closed, but I had to put this out. These poor people are slowly edging their way to $3 B and 5 years late, which is what I estimate. The 1.6 billion is probably the figure right now, with 2B needed to save the machine. When they start grinding the sandstone, 0.2 B will go to the machine disintegrating right in front of their eyes.
An extra 2 years is added to waiting for the rock to stop rapidly converging, since they'd be nuts to pour into that. One year for patching the massive overbreak before they slip-form the lining.