Customer service note: We are experiencing technical issues with our phone line. In the meantime, please email sales@allenbrothers.co.uk. We’re sorry for any inconvenience.
Osprey Tuning Guide
http://www.pinbax.com/index.asp?selection=Tuning%20Guides&tgid=32
http://www.northonedesign.com/Portals/27/docs/One%20Design/Osprey%20Tuning%20Guide%202013.pdf