They set up plenty of rexes over the years (inc mine).

They know their stuff, take the time to get it right (carbed bikes always take time on the dyno), and can set you up according to individual preference. They've had their critics, but I don't know of a single tuning house which is universally approved of....

Remember Nick saying to me that tuning the motor was a doddle compared to tuning the suspension on the rex. He was right. Cadbury GPZ is one sweet looker btw.