I haven't flown my Blade CX2 in a long time ever since I put the bladecx2.com extreme core upgrade on it. The problem I'm having is when I try to just fly forward, it wants to also lean to the left while going forward at the same time. I've adjusted all the linkages to make sure the swashplate is perfectly straight and also checked all the ball links and they are all free. I just don't know what else to do. With the parts I have installed, I should be able to fly it a lot more aggressively than with the stock parts.