Well, the rifle has been sent back to the people at Winchester (Olin - Australia) and they have agreed that the rifle will be replaced. They will be taking up the fault with CZ and also asking about the express sights.

I must admit, they were good people (Olin) to deal with and did not mention once that they wanted to have a go to repair the rifle rather then getting me a new one. Well done.

All I have to do is to wait for another rifle, which isn't a real problem as I haven't received my 100 rounds of handloads yet.

Cheers