Thanks for the settings doc Musician.
I see that you are using the Black Tone setting. I have found that to crush blacks on my stock 8550.
Have you found that not to be the case after updating with the 3500?
LG OLED55C6P, Panasonic UB-820, Sony UBP-X800, Zidoo X9S, Denon AVR-X3400H, vintage Carver M1.0T amp, Axiom M60v3 Mains & VP100 Center, Original SVS 20-39pci Cylinder sub, Phase Tech Surrounds & 2 Polk RC60i Atmos. Desktop system: Fully restored (by me) vintage Marantz 2275 stereo receiver from 1976 driving a pair of Axiom M2v3's, BIC 10" Sub.