ROFL = Rolling On Floor Laughing.

It means you are saying or doing something that makes me laugh.

In this case, you telling us what Ed was thinking by analyzing datapoints which are not always well-established is funny to me because my wife tells me what I'm thinking, and even knowing me very well for 23+ years she is still wrong most of the time. Very presumptuous, IMHO, but I guess that's what makes you the expert.

It's nice to learn about the possible history of the model in your possession, but I fail to see how you can be so sure of yourself given circumstantial evidence 40+ years after the events. As prodigious a builder and experimenter as he was, could it not be that you have a different model - one that is otherwise unknown/undocumented? With 40 years of cutting balsa wood, I have had models given to me that I don't recall building, but upon close examination it looks like my work. Sometimes.

Andy