Thanks for the tip.
Unfortuantely, the cost and time involved in sending the thing back to coghlan's from Singapore negates the potential benefit of them (hopefully) fixing it.
<img src="/images/graemlins/tongue.gif" alt="" />
Anyway, the whole thing is made in Hong Kong, and didn't come with an O ring in the first place <img src="/images/graemlins/mad.gif" alt="" /> As a striker, it works pretty well and I have several stashed away to light my alcohol stoves. (No need to carry matches).

I will look for different O rings and try my luck.... <img src="/images/graemlins/grin.gif" alt="" />