Same way you would. Such a wing was necessary in the context of a thorax dun.
Yet, why wasn't it necessary for the skater?
Remember, the thorax dun was as much about its supposed footprint on the water as it was about the wing. How in the world could Marinaro possibly have a hackle wing in the context of his thorax dun? To sit right, the hackle was always going to be relatively undersized.