It's a little hand made exotic jewel it is - quirky but really rather nice - quite extraordinary in fact. I haven't fitted it yet as I have a stinking cold (sound of violins please). Apparently there is also a boron cantilever version called the 'Boron Supremacy' (you couldn't make it up). The truth is I'm more than a little excited - it's certainly not a 'me too' product and quite unique both in terms of technology and construction.