Micheal,

I figured out what I was doing wrong. When I was selecting the "face" of the extruded piece, I think I was clicking on the whole piece and deleting it, which left me with the big hole and not the extruded face I wanted. I realized if I click on it, then click on it again, it selects just that face, then only deletes that top piece and gives me the effect I'm after.

Chalk it up to still learning the software I guess?

I have some more playing around to do to really get comfortable with this aspect of the process.

Thanks again for the help, it really is invaluable as without it I'd spend hours of frustration trying to figure out what I'm doing!