I've been keeping the music going a lot and just changing the basic 10uF's with the North Creek Zens has made a *huge* difference in my sounds- I'm sold. No bypassing, haven't touched the other two on the board. I did change the horn attenuator out for Auricap/Mills when very new. I was getting frustrated because I got a couple good Cleveland Quartet/Beethoven late quartets and when all 4 instruments played fast runs it was getting hopelessly congested. Now it's very clean, the sound is probably very rosy, but with good detail, and I'm going to wait a couple weeks before doing the next thing. I still have the other 4 Zen Tens, will probably combine those with a high-end two for the 22s. I'm very sold on the Zens!