Ohm -- tons of thanks for taking the time. Very convincing post indeed.

I had already sent her a mail based on CT Medic's post; will wait a while before sending this one on -- don't want to avalanche her.

Meanwhile -- this board is quite incredible! Scientific questions, medical questions.... I feel like if I had a splinter in my foot this board would pull it out, and give me a toy to play with so I wouldn't notice the pain.