In the just build the thing and most answers will come to you department, I finally have a fresh thought... I have completed 90% of the wood construction of Roger Mann's RW4,5,6,7 with about 90% to go. (I have tail feathers to complete and any fuse accoutrements beyond the elegant box.) I have left tail feathers til last as I am undecided on the final design. (Church Midwing or the Duster or even the Heath Parasol...). I keep changing my mind. Regardless of such as in that I am now carving the metal bits and ordering some more that I don't have the resources to carve (all the exotic AN stuff...) I finally have a non critical question. The design calls for an elevator push pull tube. As I see it, the tube is unsupported (difficult with some vertical deflection along the entire length due to elev movement) for the entire length. Is it common practice to have the tube merely suspended from the horn at one end and the control hardware at the other? If you study Roger's plans closely you find a side drawing of an elevator bracket (a short piece of 4 x 2 aluminum tubing) for use rather than a conventional horn which is an interesting idea. I see no advantage over the horn except it would take five minutes to carve and not an hour to fab the horn and you would save the cost of a rod end but introduce a point of wear to preflight inspect. I might just go down this road with the addition of a sleeve bushing through the tube for the bolt to pass through. If I'm lucky, the tube will whistle at certain airspeeds.... A worry about next year issue.