This would be great fun and great learning! I'd like to participate. I assume a RAW file is what would be needed. As you said, James, if nobody has one they're excited about I might be able to come up with something. Do you think there are other attributes of this public file that would be important? Like:
broad range of colors and luminance, mix of areas with complex detail and areas of much less detail, action vs no action? I'm fine with whatever and would also be pleased to work on one of your Death Valley shots.