Pete,
One question. How much smoothing in the data above? Also, a 70-75dB scale will tend to make it easier to read the graph which is nice, but it also hides details that may be important, especially above 1kHz. Holm Impulse's smoothing is a sliding timing window, and some authorities disagree with the way it smoothes data.
Hope to hear your stuff at RMAF! 
Best regards,
Anand.
We will have the Aurora at RMAF too.
It's been a while since I took those measurements, but if I recall correctly, I used a straight 12th octave smoothing to make the stuff below 500Hz at least readable.
Here's a shot of the stuff above 300Hz using only gating, no smoothing.
