I think the plans accurately shows a Dubro tail wheel unit too. I haven't looked at mine in a few days. I like those better due to their more compact size. I just put one on a plane a few weeks ago. I think they are half the price of a Sullivan. I've used both.

I have a Somethin Extra that has taken a beating by the guy who built it and from me. It uses the wire in the rudder method. It worked well with CA hinges, even though I don't trust those, and now with pinned nylon hinges. I was doubtful too, but it works really well and is light. I need to build a new rudder and I'll use the same method.