Classicflytier, first off, Ron's fly looks great so I'm not about to say you can't tie your herl concave side forward. I just tied two sections of herl, one each way, and I personally like the look of the section with the convex side forward better, for ME. It's more solid looking, like a dense hedge, which is the look I want. The other way, concave side forward, you can see more of the hook and the look is a bit more airy. Either way, on edge is a good way to go.