Bob - Thank you for the link. I haven't gone there yet but will this evening when I have time to really look at what is there. Your suggestion that we invite John to speak at the symposium is good. It would be great to have both Tod and John as speakers but the schedule was finalized a few months ago and I would not be able to change it now. I'm not running the thing; I am a member of one of the organizing committees.
Sandy - thank you for the file - much appreciated.