Thanks to everyone for the kind words and for understanding the experience.

John in Brisbane, Gaz kindly included a blue clilcky above which takes to to a site with answers about the Copper's material.

DebC, Thanks for the kind words. That was indeed us in Redding, although that us didn't include me. I was unable to make that trip. You would have seen Doug, Dale & Mitchell. Those were the days we were a four man trio. Therebye hangs a very long tale.

Cheers, E.S.