Great read about EMH, page-160

My gut is telling me lmax, may be reasonable on a smaller scale project, but unrealistic large scale. even if they source all their sulfuric acid abundantly, after they are done with it they are still responsible for its disposal and there may be resell/ contamination issues with that. contamination of tailings has certainly been mentioned by Keith and we can see that l-max it is heavily reliant on selling large amounts of that by product sodium silicate or whatever it is. I'm not going to talk more about lmax tho because I don't know The surrounding factors for sure and out of respect to lepidico I wish them the best of luck with establishing something with what they have.
KC did state it was cost comparible
I think you should trust the judgement of the md/bod/engineers on the decision made for cinovech my friend.