I am presently flying a Sig 4 star 40 w/ the AXI 4120/14 and 14 GP 3300 NImh cells and am pulling 45 amps for a power loading of 106 w/lb, and this set up will be going in my Sig something Extra. However I may try the new Poly Quest Lipo 4 cell 4000 mah pack [$149.00] from Hobby-lobby. I will be saving about 1 1/4 lbs with this change I think you would be happy with this setup in the Somethig Extra