The samples that really matter are the samples produced for commercial use which will be Gen 4. But if the Gen 3 can produce enough product to satisfy the needs of the first customer in line then the results mean a lot for that customer, or for the customer who is the highest bidder for what can be supplied from Gen 3.
I would like to know if the pilot plant will remain producing once the commercial plant is up and running or when the commercial plant is under construction. Plus the pilot plant may be able to produce and the commercial plant flop as that next scale up may not work as well as the pilot plant. so what ever the pilot plant produces should have value and be sold. Plus if the pilot plant is still producing when they are calibrating the commercial plant having the pilot plant operating will help with any adjustments if there are issues.
Quite the engineering to get the project to this point, brilliant.