Once you start to get some of the data in machine-readable form, it becomes evident that much of it is crap. Check out, for instance, the entries for the oil dipstick tube in AQS illustrations 1-00, 1-15 and 2-00. Make any sense to anyone? -- Phil Payne http://www.isham-research.com +44 7785 302 803 +49 173 6242039