Actually a flip out full is the way to go like PoPo has. Nothing like getting caught in a rain /hailstorm with only a half windshield on when you have a full windshield back in the truck - yes this just happened this past weekend
I don't like riding with the full windshield in dusty / warm conditions -got to have air flow.
Is the back roof fin for lights in the rear? Kinda looks like that, might get caught on tree branches where I ride.