Michael,

Thanks for taking the time to explain this to me.

The next step I had envisioned, after deleting the hightlighted trimed surface was to use the edge of the new "hole" as one rail of a Sweep to create an inside wall for the air scoop. I discovered that I don't have the option to do this.

I need to better orient my thinking on how to use the software for this problem but being a newbie, I'm still learning.

Thanks again.