Fall setting possible or not ??

Moin Moin first time. Have a question to the forum today. I was on Wednesday at “Everything except expensive” for axle measurement (exchange of track rods). On the protocol I saw then that the fall at the front left is outside the norm and asked the fitter if this would not be adjustable. He said that the fall at the Omega is not adjustable. A call at the FOH resulted the same. But now I read in the Etzold that this would be possible (Etzold Volume 96 page 158). Now to my question: Is d are the necessary long holes available or do they have to be sharpened 🙂 Many thanks to the team for the many helpful answers to this topic.