Wow, you are the exhaust God! I've never seen anyone make so many modifications of the exhaust system!
Can you kindly post a picture where the entire exhaust system can be seen? I'm quite mixed up with the final setup.
Why did you decide to go with the cut-out configuration? You seemed to be very happy with the initial UR setup...
This is my final setup. Sounds nice and loud but it began droning quite noticeably from 3-4K RPM after I switched to K04 (I guess that is the result of the increased gas pressure). I would appreciate if you could give me a piece of advice on that.