Claim 5 is a bit puzzling to me :

A key feature of the plasma magnet is that the diameter of the magnetosphere increases as the density of the solar wind decreases as it expands away from the sun. The resulting expansion exactly matches the decrease in density, ensuring constant thrust. Therefore the plasma magnet has a constant acceleration irrespective of its position in the solar system.

I'm not 100% sure about the science here, but the "exactly" looks a bit magical to me. If I understand the concept correctly, when the sail is closer to the sun, the particles "pressure" on the sail will "compress" and reduce its effective area.