Here's an idea. I see Dan has what appears to be a very professional a/c weighing service. Why not try to get an example of each model RV and put them on the scales. It would provide a real world baseline of actual a/c weights. Limit examples to those that are painted with interiors. It would be a great excuse to meet up in Chino, swap stories and covet thy nieghbors airplane.
Tom
RV3
Tom
RV3