@PASBOZ, I posted on this issue a while ago.Some METs I saw suggested greater than 75% recovery but recovery depends on level of concentrate produced, but I am not sure how the historical METs transform to the current proposal. A bit more information on tin, in these two embedded posts.Post #:43553026Post #:40024479A table from a previous 2019 study which comes from one of the above embedded posts.All IMO