RE: [log in to unmask] Andy, Well spoken! Thank you for pointing out that we can _all_ learn from each other, hobbyist, commercial, and scientist alike. There is absolutely _no_ one who knows everything - there's always something new to be learned. As many have said, it is quite easy to hit the delete key if a message in the list comes through that one is not interested in. I have done this on occasion myself. Sometimes I must delete messages due to lack of time, sometimes lack of interest in the particular topic. Sometimes, later, I wonder if I have missed reading something important that I deleted. I have not seen much posting from the scientists on the list. Perhaps, instead of contemplating leaving the list, they would post something. Most likely, other scientists would reply and a thread would be started. Perhaps some hobbyists would reply as well. We can all communicate together! Laura Downey ([log in to unmask])