There is much discussion, and numerous papers on spin, in relation to Bell inequalities etc. The majority of these discussions refer to the Stern Gerlach apparatus as the detecting device, and arbiter of the EPR paradox. The vast majority of actual experiments use polarizers and PMT's.
If one considers the fact that most discussions and papers only report on gedanken or thought experiments, relating to Stern Gerlach, then one is apt to wonder as to the veracity of these reports. Even the misreporting of the actual shape of the image obtained from the original Stern Gerlach result is astonishing. I have a link to a peer reviewed paper in support of my argument.
https://jumpshare.com/v/WNETrGGUb7UYcoR4YacS
Barry