The big difference is closing off the airflow under the headlight, which then proceeds up over the top of the tank. Of course, I did not do that without making it as wide as the bottom of the windshield. However, a few facts of history, from previous trial and error testing of this concept:
1. Making the flat plate wider than the bottom of the windshield did not help anything, not even protecting the knees more.
2. Using the original lowers, even very long lowers, did not help anything, not even protecting the knees more. They are not nearly as good, because they did not stop airflow coming from under the headlight.
3. The only future improvement that I can imagine now, is to glue a strip of the same 1/4 inch thick Plexiglass (by its edge) laterally to and extending the width of the bottom of the main flat plate. It would be about 1 inch front to back. That right angle edge should function to split any remaining air that would have otherwised come up behind the windshield. With that right angle edge, the air should be parted/split, with some going up in front of the windshield, and some being forced downward by the " > " edge (like the front of an airplane wing). That should reduce airflow on the knees in the winter, and come winter I will probably try that. Hope this helps, --Tom
