Well as previously mentioned "went for broke" and fitted the 5045 with a 12 inch prop running on 6 cells. Motor could handle a lot more prop but at this size the current will be considerably less giving longer flight times. The Zippy 3000 maH 6 cell lipo balances out the big motor too. AUWeight just on 2 kg.
So Tuesday made a quick run up to Cashmoor, no-one there! I will do my test flights and go home then. Swap out the GPS module too. Below is a quick video edit.