So, today I left the car at an Audi garage. They had the right tools, but didn't manage to adjust the camber correctly on the front right wheel. It is off by more than a degree which, with my simple trigonometric calculations, corresponds to about a centimeter at the top of the suspension strut!
The camber should be between -0d15' and -0d55' (d means degrees and ' means minutes or degrees/60). The left weheel is -0d37' which is fine but the right wheel is +0d48' which is 1d3' off.
The guys at the garage could not really tell the reason for that, but a crooked suspension strut could cause that much misalignment. I told them I had changed the spindles to ones from a Skoda Fabia, but since the left wheel was OK that shouldn't be the cause, should it? They also told me there is noise from the right wheel bearing meaning it is about to get bad. Not enough to cause wheel misalignment but enough to make noice. Well, I have a pair of used wheel bearings in the Audi spindles ;-) I'll see if I get the energy to change them.
The garage managed to get the wheels better aligned then before and the car handles better, but I would like go get the alignment right. I'm afraid it will wear a lot of tires otherwise.
Maybe I can fit racing camber adjusters at the top suspension strut mounts? Maybe they are very expensive?