i just bought a eflite blade cp, i am not new to helis but have not gone into forward flight yet(except on a sim) i got this heli and i am having problems with it, the tail rotor will NOT trim straight, i have the 4-in-1 board adjusted all the way and i have the trim tab all the way over and i still have to hold about half stick to keep it straight! whats going on? any help will be greatly appreciated....thanks