I have two DC H10-13 headsets, integrated into the leather helmets for open cockpit flying. They came with the plane and seem to work fine, though I have nothing to compare them to, and it's a noisy plane. The gel ear seals are kind of wrinkly, is that normal? Or are they supposed to be partially filled like that so the fluid can move around to make a seal? Certainly they don't look full and smooth like the pictures I see in catalogs and websites. When compressed they smooth out. There's no evidence that anything has leaked out, though.