Is this really quantum mechanical Heresy?

Hello everybody, I'm Geistkiesel and this is my virgin post in this forum.

I made a protracted study of Stern-Gerlach transition experiments described by Richard Feynman in "Lectures on Physics" Vol III chap, 5. An intriguing discovery shows RF making some rather inelegant and obtuse errors in physical reasoning. One of the "errors" (translated: bad choice) was using an 'interference amplitude' model, which effectively screened out consideration of altrnative models that would have better served all purposes in that particlular situation, at that particular time..

The experiments are faithfully reproduced in my link below with a slightly different notation, which can be easily verified.

There is a 'gotcha' I wasn't expecting. For +S particle transitions through an unobstructed T segment RF boldly manufactures a positive 0S state amplitude for the ouput particle (all spin-1 by the way) exiting the middle T channel with a comaprison to an obstructed T segment transition in the second experimental line.The transition sequences flow left to right.

Is this QM heresy?

The link is already a piece of admitted QM heresy, so any reminders of that fact will be taken as redundant, if you know what I mean.

Thank you for your kind greeting.