Q. The least clear thing is how to keep web-crawling from taking forever. I haven't worked fully through Deb Flanagan's tutorial but it seems that there will likely be a bunch of luck involved. I spent several hours reading about my chemicals and am found a lot of repetitive information without finding anything new to report. Guess I will wait to see your comments.

A. I stick with one engine. Then I know the syntax. But you have to become skillful at skimming the hits, then skimming the documents when you get them. Using the EDIT menu then FIND can help you get to where you hit was in the documents, often but not always.