> =D8yvind Thanks very much for your insight. I might look at what you suggest when I have time. At the moment I'm so busy getting a project ready for the National Fieldays it's no great trauma for The Herald and me to part company for a while > (back to lurking?) And a fine job you've been doing of that ;-) -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist