In reply to Stuart Graham:
I have used zero-G krabs of all types extensively and they are excellent. Also of note is that the screwgates are some of teh lightest on the market yet way cheaper. I have no idea why Zero-G do not make a bigger deal out of this low weight.
Some people are snobs and would say that cheap brands are no good. In my experience this isn't true. All climbing gear on sale in this country has to meet the same standards by law. Cheap gear may have less frills (although I don't believe this to be the case with zero-G krabs) but is perfectly safe and useable. I say go for it!