Phil,
After working with the CAD for a few hours, it became apparent that some more extreme radii would allow a nice rendition of the streamlining template.
This first graphic shows the use of 4 radii, namely 3.75H, 7.5H, 15H, and 30H.
Now take a look at the second graphic.
Several things are obvious from this.
First, either my math is off or the template, in it's current form is not drawn 5:1 in length.
Also, the 30H radius is drawn at an ending angle of 22°, just as you have mentioned as the maximum angle that the template should show.
There is probably a mathematical function, or a wing design program out there on the web that would model the streamlining template better than what I have shown here.
Jim.