Thanks for the info Y_Phil.  I sometimes save material packages for changes to materials I have done.

And yes I like simple. I was looking at some of the material nodes people use on some avatars. I don't understand why some are so complicated. It just slows down render time. A lot of times I just delete nodes until I see a difference in the render. Many times I can remove many.. For GPU rendering not may nodes are needed for a great looking render.