This is a lovely thread. I don't think I've come across it before.
Michael, it's good to see you still posting and sharing knowledge. I see John is still active on the forum too and I know Ken and Scott are missed.
In many of the photos/links of the control rooms the horns appear to be shooting over an engineer's head if seated at the console. Do those horns have much better vertical dispersion than I assume they have? Do they not want to be on axis vertically? Is it an optical illusion?