I'm just finishing a Senior Telemaster build. Per the plans and instructions the flat bottomed wing halves are to be built on a flat building surface and then joined with epoxied in dihedral braces. The resultant wing is mounted with 4 1/2 degrees incidence but as best I can tell would have no washout when built in this fashion. Non is mentioned in plan (or instructions such as they are). One might surmise that I think very little of the "instructions" supplied with the kit. They would be correct! I love the plane however and am excited about an approaching maiden flight.