I think your strategy of buying several mines that are commissioning is a good way to go. I bought small interests in AMI, IMA, NCZ, PNR and HRR and then build them up as the mine production ramps up successfully. Even if one or even two fail you can make money in total and keep exposure to any mine limited until performance is confirmed. I have not yet added to my original HRR holding as we have yet to see the results of commissioning though I have built up my holdings in all the others above. The strategy has certainly been successful to date in aggregate, but some mines do not work (look at TRY for example which I held and sold at a loss).