Just finished watching the video on my HDR monitor, and the dynamic range on the regraded footage looks stellar, particularly during the Powerline concert.
How did you manage to upmix the audio? If you’re ever looking to improve on that front, I highly recommend Penteo Surround Pro. To my knowledge and experience, it’s the only plugin that upmixes stereo audio without introducing additional perceptible artifacts, allowing the multichannel audio to fold back to its original format perfectly.
It’s… not cheap. The “plus” (+) variant of the plugin is even more expensive, but at the very least, the standard “Pro” version is absolutely worth it. I have the standard one, so if you ever need a cleaner upmix of the LaserDisc audio, I’d be more than happy to help.