Re; grinding suggestionThe narrative is somewhat hazy, however, it appears that the leaching process is being somewhat frustrated by the nature of the host rock (perhaps more resistant to the leaching process). In this case, going forward , the suggested fine grinding process may be necessary in any case. If indeed , the solution is extra grinding , I don't see where the added average cash operating cost will be significantly effected. How much would a grinding mill cost ? $50-60 million ? The presumed additional recovery would more than justify it. Amortized over the life of the mine it wouldn't be that big an issue.