Hi shooter, what a spectacular system.
Can you tell us more? For example, was it hard to dial in the field coil voltage? Do you feel it has enough bass? How thin and stiff is the paper cone compared to say, Lowther, AER or Feastrex (which as I'm sure you know have micro-thin but stiff cones)?
I also have enormous single-driver horns (not quite that large though!) and I'm finding that placement of the tweeter is a challenge (if trying to time-align it physically) because the tweeter has to sit somewhere "outside" the frame of the primary horn).
Really beautiful stuff (and nice room too!)