Did anyone else have problems with the tail section? I worked hard to insure the lower wing was setup correctly as all measurements seem to go from there. I leveled the plane on a flat surface leveling from the front engine box and the lower grove for the landing gear. Once level, I measured the distance from the surface to the tip of each wing and managed to be a little less then a 1/16" difference. (Things were looking good.) But the tail section is WAY off. After doing a trial fit and sliding the stabilizer in and in that short distance tip to tip it is 7/8" difference from the left to right tip! When putting the Fin in it is also out of plum the same direction and basically the same distance. The instructions say to "carefully sand the high side." That does not seem possible, the gap would be too large. Any advise?

Thanks