Two... There was quite a bit of crud in there for something that was only 2.5 years on the road. Also, the casing of the m/c appears to a lightweight moulded material, all in all not conducive to longevity, however, I haven't heard anything about it being an issue with Holdens.
I'm ashamed of you Pete, putting that toy of a thing in your Zed...is it going in your car ? I hope not