Thanks John,
Also all the contributors to this thread. Even for those of us that already "knew" most of this stuff, it is good to have it in one spot, and read it all at once.
Much appreciated!
Will Prout
My pleasure Will. And I hope that the thread is contributed to by more people because the one thing I keep finding out is how much I don't know.
Thank you to everyone who is helping to fill in the gaps.