Got it. Thanks again for all your help!

Hey Dave,
I'm re-creating what we did the other day, and got so far as selecting the edges of the new panel using hidden geometry and trying to scale it up...
We didn't use scale for that did we? Did we just use the "move" tool to make the panel bigger?

Ha Ha! It's a lot newer than V7 and V8!

So I tried the corner rounding trick in Version 2014, and I can get as far as the tangent arc, but don't see how to get it to crop...

I didn't know I had a PM, because I'm not sure where the flag shows up. But I answered it.

Well @#!%$!

I made the profile and square a component. Then I scaled it up 100. Then I extruded. It looked great. Then I saved... and then it looked like this:

Hey... Be nice. I'm a slow learner...

OH! Guidelines, of course! That alone will speed up the process.
But I can't seem to get the darn thing to do a tangent corner round to save my life. Sketchup is balky in my hands...

I've followed the directions, but I'm still getting screwy results.
So here's some screen caps. The first is the setup. I've got a 14x14 square with 1/8" rounded corners as the base, and a 3/4" x 7" profile with the right end dead center of the square about 2" off the base.
When I go to extrude, I get this message that the extrusion doesn't begin and end on the profile, and then all the corners are open...

Maybe one more tip...
I've been drawing up the square, then putting squares in each corner, then drawing the arc for the roundover, editing it to the right radius with entity info, then deleting the unwanted lines. Is there a faster way to round off each corner?