I installed the Verastarr Stage 3 upgrade on my M3 Turbo S two weeks ago. This is the complete silver foil upgrade with bypass caps. I did notice an small increase in treble detail immediately. Since then I have been doing tube rolling in my Schiit Freya preamp trying to find the combo that sounds the best. Two days ago I thought I found the best tube pairing, primarily because the sound stage sounded the deepest, but also the treble detail had improved some more. So to confirm this, I put in a completely different set of tubes. The sound stage and everything else was the same, all great. Almost no difference in sound. I attribute the sound improvement to the new bypass capacitors finally breaking in and possibly also the silver foils. It was an aha! moment similar to when my Yggy DAC had approximately 200 hundred hours on it. So if you are handy with a soldering iron, I highly recommend this upgrade.