DonPeterson, I just tried your method to use pink noise
and capture wah setting with Systune dual FFT measuring system.
(I use Systune at work for tuning in sound systems.)
The result was quite impressing.
here the setting from my old modded Vox Wah:
Manual : 3,7
Peak: 8,1
Pedal range: +29%
Peak range: -42%
Mix:100%
Volume: -1
Thank you so much Sir for setting me on the idea to use FFT to measure a wah.