I haven't modified mine. It is a stock 3 cell lipo powered version, but I did get the vector thrust unit to stick on the back. It flies great. But with three cells if you get it into a high alpha slow speed mode, it doesn't have enough power to pull out of it. Thus if you are too close to the ground, you wind up making a controlled landing like that as you can't get the nose down to fly out of it. But it sure does a wicked buzz saw like effect for the roll rate. Too fast to count.