Stefan,
Sorry about the delay, busy reading & responding, then a weekend away.
I think we too often rely on assumptions and hearsay in physics. Those and poor descriptions leads to much misunderstanding. Lets just deal with actual results rather than what people may of may not think or 'know'.
The only 2 slit experiments I know not showing interference patterns on a backboard are when actual states are changes or blocked. I've done the one removing it with twin orthogonal polarisers myself, similar to to the 3 filter case in my video and as my model predicts. The single slit after the pair in Fig2 just makes it a single slit diffraction case. Zeilinger was of course entirely correct in the (once removed) correlation of paths 1 and 2. If you can find any actual experimental results showing no 2 slit interference do please post them.
Also compare Zeilingers findings 15 years later that photons have 'no memory' of previous state with the analysis his 1999 paper, assuming the contrary at the path 1 lens! (s290 right hand para; "..provides information about it's direction, i.e., momentum before entering the lens.") Sure understanding improves, so lets keep up with it!
The Key point here is more fundamental Stefan. In my schema there are TWO 'states' as opposed the the assumed one, and orthogonal, and thus no case of 'which path'. It's the false initial assumptions that cause all the confusion that follows. All have recognised there looks like something wrong or incomplete in QM, Einstein, Bell, Feynman, and Anton Zeilinger!; (s292 bottom)"Such a picture would imply a theory underlying quantum physics which provides a more detailed account of individual mechanisms". All I've done is identified it, allowing a coherent interpretation without needing the illogical nonsense!
If it were the other war round, if we HAD the sensible derivation and I was proposing an illogical one relying on wierdness and backward causality then I'd expect all to resist! I suggest the only problem here Stefan is quite normal cognative dissonance, as the first part of my essay identifies.
But do present any ACTUAL apparently contrary findings. I have searched for some time but perhaps not exhaustively.
Very Best.
Peter
PS; See also my blog ref to Pauli's important spectral lines solution, from which we got the periodic table. His strict condition was that the valance electron HAD to somehow have TWO-VALUEDNESS! He never did did find an explanation of what that meant so we've always assumed it's 'classically indescribable'. No longer perhaps as that's exactly what the 2nd state is.