Rhino 3D Revolve to create a housing

I used revolve to create this housing. I would like to add the thickness to show it in true 3D. It is .015" thick. How do I go about getting this?

You can do it a number of ways. I use offset curve and created a lip curve, then did revolve. If you leave one curve end open the surface will close itself when the surface is revolved.
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