On the subject in the title: A 40-week log with the measurement method stated Working notes rather than a conclusion.
Asking about 40-week log directly, because I have read four threads on it and each answered a slightly different question.
The version I want answered is the narrow one: given the method stated below, is the result within what anyone else has seen? I am not asking what it means yet.
Method, numbers and the two assumptions I am aware of making are below. If the assumptions are wrong that is more useful to me than agreement.