Thanks to all! Etchasketch cracked the code on my boolean problem. I had a secondary the same night I posted the query: I could not select a shape in the Vertex Modeling window. I kept getting a message that said "An unknown error has occurred..." I was thinking that mayhap my polygon count was too high [tho' the model was barely started]for the resources computing them. As it turned out, that problem went away when I re-launched the doc. in the morning. Thanks again.