Great write up and great pix: many thanks for sharing all this with us, not to mention your enthousiasm.
i would be interested in having pix from the original xover of the RP-8000F: is there any chance you kept them / can make some pix so we can all see the starting point? The idea is to trying to find out the caps values and overall schematic Klipsch followed for its speakers...
Just asking, if yoo much trouble no issue of course
Many thanks and enjoy your music very much in 2022
Claude