If they had concocted a fraud, I would expect them to keep using the same fraudulent device, not start making copies and refining the fraudulent device. This latest demo apparently involved a newer, smaller model, consistent with the idea that they have a new invention that is rapidly being refined.
They now say they will need 300 units instead of 100 for the demonstration 1 MW reactor. This strikes me as a sign of authenticity - that the earlier, rosier prediction is being replaced by a more reserved estimate based on issues that are cropping up as they get further along in implementation. If they simply had a fraud, why change the numbers?
I tend to agree with you. So far I’ve seen nothing that smells of fraud. It looks legit.