In the end I was only able to find one person who had ridden an Azub (Max) but he no longer had the bike so I bought something quite different.....
A Bacchetta CA2 - and think I have it nailed, managed to average 33.4kph on a 25kph ride on Sunday but only 33kph on the return into a headwind :-(
Once you get over the high rider altitude sickness
it's really rather good !