Ori web site seems more active thaan Mezzo.
Possibly UK owners should be looking at Ori more for support?
They make 10 models, including ths carbon fibre Supra(lust).

THere was a thread abour ori dealer in london recently ,"diaode100?"
I will ring a london dealer soon to see what lowdown on spares and accesories is.
RE undergearing see dualdrive on a mezzo thread.
Other than changing the hub,its possbile to fit up to a 56tooth front ring. No bigger,due to chain catcher. If you do you will also need to Add a birdie chain guard for around £25.