Well, I see a larger gap on the port side wing, than there is on the starboard side. The gap could be making the plane list to one side when balanced on the paint jars.
And it could be that the forward aerial isn't 100% perpendicular to the centerline and is leaning to the starboard side, making the tail look as if it's twisted to the port side.
Just a few places to start looking.
I'd find it extremely hard to believe that both sides twisted aft of the canopy after being assembled. For that amount of twisting, it would have had to been exposed to enough heat to soften the plastic and enough torque to twist it. Something you'd notice before now.
-Fred