I extended the wings and did get a better flight time. This flight is about 4 minutes and used up 1341mah, which points to an estimated flight time of 9 minutes. I did get into trouble once, so need to re-tune some other parameters to accommodate the new wing angle. However, overall good flight and I had enough juice to land. I will see if I can somehow push 10 minutes with some other adjustments. Meanwhile waiting for the 3 blade prop to see if it can give me a little more kick so I have enough juice to land after a 7-8 minute flight.