Mine has the same problem, the only thing that I did to make sure that it was safe, ist that I increased the TE dowl by about an inch on both sides. The plane flies like a dream, and the gap doesnt effect the plane one bit. I realized that it's the metal bar that is causing the gap. If you take the bar out and line up the wing to the fuselage, if it's like mine, the wing sits pefectly beside the fuselage with no gap, but when you slide in the metal bar, the gap appears.

Scorpionjack........hush up and relearn how fun this hobby is/was 30 years ago when you started