just reading about them val i will give you the link, not sure how to do this so fingers crossed lol http://cactiguide.com/article/?article=article3.php
hope you can copy and paste

Thanks for that San, got it straight away. Having read up on it, was not at all what I expected.

glad it helped val, are you goin g to get one then or not?

Sent pm San , you will laugh !

ok