Ok guys I flew my WS40 yesterday. I did put my OS 70 on it. I am running the wing with 4 servos but all are set to act as big ailerons. I am running max throw with 40% expo, and it balanced on the spar with 2.5 ounces of weight in the tail. This thing flew frigging awesome. I think it flew better than my funtana. It spins, tumbles, and flips very well. It also tracked very straight and I was able to do some nice basic pattern moves. On low rates I think this be fine second or third plane that could expand into a 3D'er. It landed nice with the power off and woul;d settle in tail first. This was essential because my 14 inch prop had 1 inch of ground clearance. Like most arfs it couple coupled horribly, I was able to get a full roll using the rudder. I mixed all out with my 8103 and now I can do a control line pattern. So far when I parachute it snaps off to the left. With the 70 it loops really big. I will keep cheeking the glue joints but so far its holding up. I got pretty fast coming out of some dives but didnt get any flutter. The only hard part of building it was the dual elevator pushrod, but I suck at bending those anyway.