"Most of us record concerts from a distance."
And that is what makes PA-amplified concert recording in particular and the methods used to do it unique in comparison to most other forms of audio recording. The standard approaches to audio recording as typically done, and the situations to which they apply, are actually a rather small subset of how most amplified concert tapers operate - sort of the exception to the rule.
I may be making a trip to Taiwan sometime in the coming year or so to visit a close friend, and if possible I would be very interested in visiting your facility. However, I certainly don't wish to be an imposition.