Now that I have 5 posts, I can start adding pictures.. Here is the CAD drawing:
Here is the frame in various stages of construction:
Finally, here it is mocked up on the truck:
I messed up a little bit on the contour at the cab. It doesn't line up perfectly and has a shallower more rounded curve at the corners. I should have checked it before making everything, but I didn't and this is where I am at. I keep telling myself that since the cab corners are kinda rounded the airflow will follow them a little bit before separating and this point is probably exactly where my camper shell starts. So this is really a feature and will make it more aerodynamic. Yeah, probably wishful thinking.. Oh well..