I wonder if anyone knows here, how much some of the top surround engineers charge for their work? Just a thought I had yesterday. Someone like SW, who is undeniably one of the top immersive audio engineers in the world, could surely charge a small fortune for his services... although, I imagine there is also an element that the demand for these mixes isn't enormous, so charging too much might simply be prohibitive for most. Also, I wonder if they do some of these mixes as favours, whether there is a going rate, etc.