These numbers are fine if you include the silver at 1.8 grams/ton and rhenium at 0.0026g/t. I'll have to confirm the rhenium number but I seem to recall this as being correct. I would also calculate it at 150Gt/d. Our mill cost is slightly less because of the new equipment. (all equipment and the techniques involved).

There a few other small details that help reduce the payback period. I've been told that we don't have the books on HV's rhenium