Hi Ken,
When I first dowloaded and opened your image, and applied an automatic ScreenTransferFunction, what I got qas the first image - with a heavy red tint.
So, I 'unlinked' the STF sliders and tried again - which gave me the second imgae - at which point I could have tweaked the re-linked sliders for best contrast - but I would normally do that after DBE, BN, and BCC (all preceded by a Crop)
Just for your information, I have attached the sliders of the two STF setups (linked and unlinked).
Hope this helps.