> That's what calculators are for? I do remember them using a calculator to work out the percentage of time that dips*** Mikey was doing any work ;-) > Has there been a response to the University of Groningen theory yet? Looked a couple of days ago and AFAICT there've been no updates --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .