In an effort to get better higher speed handling (front-end wobble at 75mph/121kmh) I decided to experiment with a windshield in addition to the fly screen.
Found a used SlipStreamer for cheap on e-bay and mounted it to overlap the fly screen, definitely reducing the drag from my chest, and hopefully directing enough of the air flow from the fly up along the back of the windscreen to create the necessary turbulence at the top.
At 85-90mph/137-145kmh the front end was very steady. Reaching forward to check air flow from the fly I wasn't impressed by the amount of air directed upward behind the windscreen so I think the windscreen did the vast majority of the work.
Since the SlipStreamer mounts/dismounts so easily I'll just leave it in place for the long highway runs, but remove for around town.
Also fitted a Clock and Thermometer.