During the day when drifting or anchored there are times when I want more shade than the OEM Mills Flying Top provides, especially to the bow area.
I use a 5x7 mesh tarp and some elastic tie down cords to rig the tarp over the front edge of the bimini forward to the bow rail. A tarp like this blocks about 80% of the sun yet allows ventilation. Cost is about $22. No mods to the boat at all. Can also be rigged to the aft edge of the bimini if desired and run to the transom. Easily stored