PEN huge upside, page-5

It's obvious you don't understand the pH scale. An increase in pH goes in the direction of a more alkaline solution, which we already know was an abject failure. I think you mean increased acidity, or a lower pH. If you fail to grasp the technicals, you should refrain from posting ramping nonsense. A lower pH comes with a multitude of disadvantages (like leaching undesirable gangue components) so pH 1.5 go 2 is about right. Short story, your attempt to ramp is without substance.

At commercial scale PEN will struggle to achieve the recoveries stated in the studies. Just like what happened with their first attempt.

In my opinion.