Hi Pete-
The answer is you won't know until you fly. I have more than 3/16" in mine and, more problematically, I built them both on the same table (which must not have been perfectly flat) so the outboard edge of my right is down about 1/4" and the outboard end of my left is about 1/4" up. (This is the worst combination possible.) The net result is that I think this is the source of a bit of left wing heaviness for me. Having said all this, and consistent with feedback Van's has given me on this issue, with the 8-ft length of the -9's flaps, I would be very surprised if everyone doesn't have a bit of twist. The larger issue is whether the twist that does exist gets itself cancelled out somewhere else in the airframe. The best answer I can provide is that your twist appears to be less than mine and my plane flies very nicely, albeit with a bit of aileron trim. Perhaps like me, you'll just plan to fly first and then decide later whether you need to rebuilt the flaps. You'll also know a bit more about what your options are when the wings are on the fuselage and you have a chance to see how the flap fits vis-a-vis the fuse.
Hope this helps. Don't get too discouraged about it at this point. Good luck.
Steve
