The spacing you used is pretty much right in line with what this proposed method suggests as optimal for that particular mic angle.

The closer spaced example in the first post of the thread (fig-8's spaced about 7" (~18cm) and angled ~50 degrees apart) was mean to be something doable with a typical mic bar width, for a what I suspect will be a common PAS angle. I chose that particular example because it represents an improvement over using cardioids with the same spacing and angle by just switching the mics to bi-directionals. In that case the 50 degree angle between microphones and the resulting SRA of 90 degrees doesn't actually match up with each other, so it's not an optimized PAS configuration in terms of the *Improved PAS* idea I initially pitched here at TS a few years back as typically implemented using cardioids and supercards. It's just something close to what tapers are already doing for PAS. I later later realized that the fig-8 pattern provides an advantage at narrow mic angles in requiring somewhat less spacing which lead to this thread. Your spacing is close to the Improved PAS concept of matching the SRA and mic angle by modification of the spacing.

With the Stereo Zoom, the correct amount of spacing between the two mics corresponds to the angle between them (or vice-versa), and in the case of PAS, the angle between mics is going to be the angle between the stacks, or at least pretty close to it. **Attached below is the same Michael William's Stereo Zoom table for a pair of figure 8s I linked in the first post of the thread, on which I've added some red dots along a red line. The red line indicates all the combinations of mic spacing and angle where the angle between the mics is the same as the the stereo recording angle (SRA), just as we'd like it to be for PAS.** The appropriate spacing between mics can then be read from the bottom of the graph below where the red line intersects with and the horizontal line indicating the angle between mics:

For the left-most red dot, the angle between mics is 80 degrees and the spacing between mics is zero or coincident. That combination produces an SRA of +/- 40 degrees or 80 degrees total, which is the same as the angle between mics. (This is pretty much the standard coincident Blumlien setup*)

For the second red dot from the left, the angle between mics is 70 degrees and the spacing between mics is ~19cm. That combination produces an SRA of +/- 35 degrees or 70 degrees total, same as the angle between mics.

For the third red dot from the left, the angle between mics is 60 degrees and the spacing between mics is ~35cm. That combination produces an SRA of +/- 30 degrees or 60 degrees total, same as the angle between mics.

The fourth red dot is just off the edge of the graph, but indicates an angle between mics of 50 degrees and a spacing of ~55cm, for an SRA of +/- 25 degrees or 50 degrees total.

And so forth..

**According to this figure-8 PAS hypothesis, the spacing you used is very close to the 60 degrees ~35cm combination and pretty much exactly what you'd want for that particular mic angle.**