It's probably just a little bend in the rudder shaft.
Try getting some 10mm rod and putting through it to see.
Make it stick out the top and bottom a fair way for a good view.
Or just take off the steerer arm and put your rudder in faceing the wrong way and see if the tilt remains the same or reverses.
I'll bet it's just a rudder tweak.
Follow the path of the independent thinker. Expose your ideas to the dangers of controversy. Speak your mind and fear less the label of 'crackpot' than the stigma of conformity. And on issues that are important to you, stand up and be counted at any cost.--- Thomas J. Watson
