I am about to start building my Angel S. I have purshased the Hacker motor and ESC as recommended with the model. I have purchased a couple of the following packs

R-spec ZIPPY packs, made in Korea!
The solid C rating and long life put the ZIPPY-Rs performance and value for money combination in a category of its own.
ZIPPY-R packs come with a 3 month No-Puff & No-Fault warranty!
Spec.
Minimum Capacity: 4500mAh
Configuration: 6S1P / 22.2v / 6Cell
Constant Discharge: 21C (Minimum)
Peak Discharge (10sec): 35C
Pack Weight: 676g
Pack Size: 36x46x195mm
Charge Plug: JST-XH

They are about 80 grams heavier that the 3700 mah pack they recommened which I hope wont make the model fly like it has a heavy wing loading. I wanted the larger packes for a longer flight time. Has anyone flown this model with this size pack?