Glad to see that Lamson agrees with me that Farid was wrong when he said Oswald was leaning at 5˚. If he was wrong in this, then why take his word on his comments on the nose shadows?
As far as I know, Lamson never said he disagreed with Farid. He has told me he disagrees with 10˚, which was your figure and for which you have yet to provide a graphic justification.
Let's not forget that in 133A, Oswald's left side is closer to the camera than the right. This would contribute, I would think, some perspective distortion to an angle of tilt.
Farid's model (when shown more true-on) seems to show a 5˚ tilt.