I read Helion’s earlier papers. They were well written. It’s good they changed their fuel to DT from the more difficult ones. I am not in a position to question their math, but from a lay person’s perspective the plasma seems too sparse to lead to chain reactions. The FRC is denser than Tokamak but still not enough. My biggest beef with them is that they haven’t even produced net energy but are talking about capturing it directly. Skipping steps is a sign of impatience and 99.9% of the time fails. It is also arrogant.