Hi all!
sorry for the delay in getting back...first of all with 2 x 110kg blokes you are going to be hard pressed to find any aircraft that is limited to the 544kg that will give a decent payload.
Back to the weight of the 750, back to my earlier post re:compromises, there ARE 750's that come in at 300kg in the US flying right now. But they had to make COMPROMISES. no fancy interiors, lose the slats, different engines to the factory, basic paint, no folding wings, or 200 litre tanks etc etc
So a 300kg 750: leaves a 244 kg payload.
2 x 80kg pax: 160kg
90 litres of fuel: 65 kg
Baggage: 20 kg
I managed to backpack through Asia for 3 months with a pack that weighed 12 kilos so 20 is plenty for me. You also don't always need to fill the tanks to the gunnels either. So a 750 is capable of being a very useful aircraft if registered as a '19'.
If you want to take advantage of the 600kg yes you would have to go the LSA route, Steve Bell and I had a good conversation about this and it really revolves around $$$ if you are the first to build as an LSA in Oz expect about a $1500 bill to go through the process. But the good news is that if someone else does it before you, you can then get a weight increase on the back of that. (From Steve Bell) These things are selling like crazy in the US so I wouldn't expect it to be long before someone imports or builds under the LSA here. Me I'm going Experimental anyway under the SAAA.