I have utilized the Air NZ Koru logo because it is a well known symbol of New Zealand already widely seen & accepted around the world. It has strong clean lines & put alongside the stars of the Southern Cross it makes for a fabulous flag! Have stuck with Red, White & Blue because some of the world's best flags use these colours i.e: USA, United Kingdom, France and Taiwan. In my view we don't need to reinvent the wheel. We just need Air NZ's permission & I feel sure they would be delighted to have even further commercial recognition at no cost to them!