Hey Wayne! i'm flying the WH 300LX with my sach's 4.2 and it flies wonderfully! I can do anything trick i like,it snaps super fast on snaprolls,and the vertical is ABSOLUTELY UNLIMITED at half power. With all the servos in the factory places and main battery pack in the turtle deck by the reciever,it balances right on the money. My ignition pack and box are mounted to the sides of the firewall box and kill switch servo and throttle servos are 2 inches in front of the wing tube on each side of the fuse. i'm swinging a 24/8 Zinger prop on it at 7100 rpms on the ground. FLIES FANTASIC

Good Luck Art