Testing in facilities for 4N purity, page-11

Sorry this statement is for me the wrong approach. As investor you should double check the risks and chances of an investment all the time.
Every player has to deal with a lot of issues.
You should be interested in this profound questions. Unfortunately I see no independent lab results. For me this is a risk position for the project.
Based on this the SMS Group wants a big premium to cover the risk of not being successful to deliver 4N. Therefore a pilot plant could really help in my opinion. At this stage of the project it is a little bit late.