There are many "azimuth setup tracks" on test LPs available today. Most provide a fixed frequency signal in one channel and then the other, allowing the user to measure crosstalk. Even with a very generous assumption that the LPs themselves are recorded to an acceptable standard, the best result one can get from it is case (b)
as we described it in the first post of the series: generator coils would be in alignment, but not the stylus!
This isn't good. We need to align the stylus, not the coils. Fortunately, there is an easy way. You can use other, even poorly recorded, signals on commonly available test LPs to verify your azimuth setting. We at Korf Audio use the following procedure: