Experimental evidence of higher order electron spin?

In a previous post I made the conjecture that electrons can have spins that are any multiple of the reduced Planck's constant, and not just the two discrete values of +/- 1/2 h_bar which we have been taught. Is there any experimental evidence to back this up? I think there might be, have a look at the following image that was taken from an article in Nature:

The experiment performed is the well known double slit experiment with electrons. I have proposed that this experiment can be explained by the Stern-Gerlach phenomenon, that is, the more you widen the other slit the more you increase the inhomogeneity in the magnetic field produced by the moving electron and the electron trajectories are then split according to their spin. As you would expect, lower spins are more probable than higher order spins, although in the image I think I can spot spin up to the order of at least 9. It would not be surprising if the probability follows a binomial distribution.