An easy one there, Mr Gazza, they advertise each month in Practical Sportsbikes
http://www.exactuk.com/about-exactfit-cam-belts/
Interesting to see they recommend a fitting tension of 99 Hz (max 110Hz) against Ducati's figure (for my 1100 Evo) of 140 Hz.
Think I'll try them next time I need new belts.