Geoffers,
Thanks for illustrating my point to a degree. An almost identical aircraft that was giving the techs a headache. The physical differences under the cowlings are almost sure to have led to things rubbing/chafing etc and this on a 30 year old type.
I think it is a grand thing to aspire to perfection and totally accurate and intuitive CAD, but the facts of the issue are that PEOPLE still assemble them and they are not infallible.
Blue skies for 2007 all of you.