Just took a quick listen to Peggy-O and If I Lose.
Headphones and speakers seem to reveal that the image is off to one side or the other. I wonder if reducing the stereo width might help make it more ... solid?
That could be accomplished by duplicating channels, summing to mono, and then mixing the mono in with the original two channels. Also
lots of other ways, I'm sure.
Mono ain't always so bad. And Red Rocks is among the most challenging venues to pull off a "normal sounding" recording, what with the wind and the changing weather and the reflections off the rocks!?
I have not made much effort to work on stereo image issues on my own recordings, other than in regards to trying to control mic configuration and aiming at the event itself, and listen and learn from each outing.
I hope that other folks weigh in on how you might remedy an overly wide or slightly off-center stereo image.
reference: Charlie Poole and the North Carolina Ramblers doing If I Lose