Look for sacs haha.
Just kidding around. I flowered three Headbangers a few years ago and didn’t have any issues with herms at all. I know Holy did with his, but I didn’t have any issues with mine. The smoke was really good, too, although not “Sour Diesel-ish” at all.
Here’s the thread if you wanna take a look: Karma Genetics Headbanger, Rare Dankness Starkiller and Moonshine Haze and GPS California Cannon