I agree with you on this. Some of the claims seem far fetched but we do need some more evidence or at least more theoretically math models on how much energy would need to be used to produce evaporation on such a big scale. If you watch the video and all of its radar models it looks possible because the map is so small. If you really thing about how big the hurricane really stretches out is hundreds of miles. Also if the storm is producing on average 40 inches of rain per square inch, these In-Place Sequential Water Vapor Generators would need to be taking the same amount of water in volume and evaporating it. That is a lot of water.