Good effort Giddyup the 1.24% Cu includes the Au and Co credits, and the 95% recovery of copper, but either way your figures are safely in the realistic zone.
your NPAT is actually Net Profit Before Tax I believe (correct me if i leapt to the wrong conclusion) - so this will effect the figures or atleast remove any of the franking credit bonuses. 10Y project earnings would be $5.41 per share on your figures (After Tax) - close to mine - and as you say each person should work out their valuation based on this.
CDU Price at posting:
$2.08 Sentiment: LT Sell Disclosure: Held