You would be surprised how out of wack an airplane can be and still be a great flyer.
I have an old Hobbico Brightstar, the horizontal stab is 1/2" further forward at one end than the other, the vertical leans off to the right. It is at about 80 degrees rather than 90 like it is suppose to be.
You would think with these flight surfaces as far off as they are it would have some kind of effect on flight but it is one of the best flying well manored planes I have had in the air.
Don't get me wrong, I am not saying yours will be the same but you never know?