Ok...changed out some op amps.... Swapped the DC offset to the OPA1656 first just to see what would happen with the stock op amps and the overall sound. It seemed to have a bit more livelyness, maybe a touch more dynamics, but that could be placebo. Not a huge effect though. The DC offset I imagine is likely really low and must not need must adjustment. Although it did seem to have a bit more transients, but that could be just me. Swapped the main two op amps for the OPA1656, and yes, much better improvement. I was worried at first because the low end seemed to drop. But then I forgot about multibit warmup. So after a few minutes and few songs, all was right again. And holy crap, it is like this thing found another gear. Dynamics are huge now. Grayness is gone, everything is crisp and clean. Low end is there and not muddy or congested at all. Matter of fact, no congestion at all. I will say the low mids are slightly recessed and the high transients really come through and jump out, so I can see why with an ESS chip might not be a good match. Overall, it reminds me of the direct Gumblefreya outs. Maybe not AS clean, still just a hair of grain in the mids, but very similar and familiar sound. Tedious damn work and I would not recommend without Chipquick. But it is certainly worth the upgrade. Highly recommended!