Ken may help bear this out, but a Symetrical wing, is one that if there were an imaginary line drawn from centerline of the lead edge to the centerline of the trailing edge, both halves would be a mirror image of the other.continuing rearward through the control surface, then it would bisect the center of the control surface. That would put the control surface lined up equally with both top and bottom surface. Upon maidening the Twist, you may find that you need to trim them both upward, downward or apply abit of left or right aileron trim. Same for the Elevator only upward and downward. Just my 2c.

Oh and as for Windy! Our clubs (TORKS) New Years day fly went something like this: Sunday morn, the wind was calm 5-10. by noon it was 15 to 20, by 2pm, it was 40 with gusts to 53! I believe my last flight was around 1:30 and the last flyer to land (Mosquitowings) touched down at 230, with a Harrierish landing of a 60 size P51D Mustang. It was a handful, but lots of fun. www.torks.org