Looking forward to trying those alignment tools myself.
TLDR- short discussion of alignment esoterics. Feel free to ignore if you prefer to pretend it's simple.
This gets me wondering what alignment might be best for some stereo combinations. Most of the time it's likely to be best straight-aligned (in reference to a planar wavefront arriving from 0-degrees directly in front)*, but I'm curious to hear from fellow tapers using these tools or doing it manually, of experiences of where a slightly different alignment works out best. The three+ mic position arrangements suggested by the extended Stereo Zoom (see the Michael Williams papers, the Schoeps image assistant, 3-mic position improved PAS) push the center forward a bit to get the image linking across the playback stage to work best. To put it a different way, is it best to align for a planar wavefront arriving from directly ahead or align some of the elements for a wavefront arriving from the angle of the PA off to one side, and vice versa on the other side.. or the angle of the playback speakers.. or? Impossible to align for all directions unless the mics are all coincident.
*But what is "straight-aligned"? Any non-coincident two microphone array with spacing between the microphone pair can only be fully aligned along one axis of arrival (lets assume directly forward/backward). Yet sound arrives from all angles. Even if we don't care about or perhaps even desire a useful misalignment of the far off-axis stuff, a simple 2-mic microphone config using spacing between the mics will not be fully aligned for sources positioned somewhat over to either side of the alignment axis. Introduce additional channels or pairs and it can get very complex, particularly if the microphones are not all arranged along a single line as many stereo multi-microphone configurations suggest. We might arrange and align for arrival from only one way along the axis - say directly forward but not backward. And the non-alignment relationship between channels for differnt off-axis angles will shift around in various ways.
Aligning mono channels that are positioned non-coincidently (rather than spaced stereo pairs) is a bit more conceptually straightforward and probably the original intent of manu of these tools, yet still when the sound sources are distributed in space one can only align for a single source among them. If a aligning a bunch of close mics on a drum kit, one presumably needs to choose which drum (snare? kick?) on which to base the alignment and let the alignment of all others fall where they may.
I don't mean to cast shade on these amazing tools, and enjoy thinking through and discussing the implications. As always, what sounds right is right. You needn't think too deeply about all this. Just listen carefully when making the decisions to be sure of doing more good than harm. Please let me know if/when you come across outlier situations when using these tools. Thanks.