WVBrookie--Thanks. I have the Karas book in my collection, along with about 15,000 other books (to the enduring dismay of the missus) but not the one on rainbows. I'll have to acquire it, and your point about a rather small gain in terms of stream miles (in exchange for a great deal of monetary expenditure and work hours) is an interesting one with considerable validity. It won't be popular in a lot of quarters, but I rather suspect you are on to something with the implied message that the real success story of speck restoration is Mother Nature. Thanks.