My concern is the COG with the 6.6 battery installed. I would normally not fly with so much bias to the rear motors without balancing. With Arducopter I test in hover in no wind to observe the motor pwm, but Yuneec does not provide that information from what I can tell. That's my only concern, but have not test flown with it yet; will be too busy the rest of the week.Guys you probably already know about the tray and the performance of the graphene being superior to this factory setup. Please contact me if your on the forum and you need a tray. Best
Glider let me know how it works out for you buddy.
What I did do is with the 6.6 installed, lowered the front arms down which drastically altered the COG making it better balanced.
The battery itself should give equal or better flight times and being a graphene will far outlast the OEM battery.