I'm not a fluent writer, but I believe I write clearly enough to be understood

Sorry Jim, but not clearly enough to be understood by everyone. In a past life I ran training courses on highly technical subjects. The maxim was always communicate to the lowest common denominator. It may annoy those at a higher level but it makes sure that everyone leaves with the same knowledge.

I fully accept that I may be the lowest common denominator here but to be accused of being stupid is rather hurtful. Which reminds me. The other maxim we always worked to was there is no such thing as a stupid question.

DtG