RVDT - great info, thanks. I think I know enough for now without breaking cover and talking to real people at CAA.
Interestingly the NZ CAA type acceptance for AB206A was obtained for the aircraft for sale that I mentioned - I didn't realise that it's the first and only one in the country.
In general it does look like the NZ CAA has taken a pragmatic and practical approach which is refreshing.
Cheers
KJ