This site is owned and maintained by Wight Hat web development ©2010. Whilst every effort has been made to ensure the accuracy of the metric calculators and charts given on this site, we cannot make a guarantee or be held responsible for any errors that have been made. If you spot an error on this site, we would be grateful if you could report it to us by Email Us and we will endeavour to correct it as soon as possible. Site design by Aaron Rudd, created: Fri 31 Oct 2003, this page last updated: Tue 04 May 2010