Finally - for those asking to hear this system.
All I know about its provenance is what evanr passed onto me when I bought them - "It is a one-off made by Sam of Predator fame and comprises 1.75" pipes black ceramic coated and internally baffled with twin wall Chromex ceramic coated heat shields."
I really like the performance gain over the full Jardine slash cut system it replaces, and of course, it sounds way better. I've tried various tunes but the bike ended up to quiet for my liking so i'm now using the original tune (in the bike when I got it - whatever it is). It's got a nice raspy note at idle, is as smooth as silk and quiet at highway speeds (unlike the droning Jardines) and under deceleration, it cracks and crackles very nicely, just as I like it.
I fully understand the design doesn't fit with exhaust system 101 theory (yadda, yadda, yawn...) - but I don't care. I like what it is and it's a huge improvement over the Jardine system (to me anyway). The full Jardine system is sitting in my shed if anyone in Oz really wants one - offers?
This video was taken from approx. 2m distance with a GoPro so sound is at best a compromise. Maxed out the noise measuring app on my phone too...