By the way, that's a pretty serious step in my estimation - paying for a bulk sample of one tonne or more of HPA to test (above and beyond lab samples).  For a company to pay approx. $50,000 or more for a tonne (or more) for testing purposes (at the commercial scale) is a pretty significant vote of confidence.  I'm hoping it's the case that several companies are set to take this next step with Orbite.