Nong,

I am not a handy guy. I did not feel comfortable to take the heli apart. I did not feel comfortable to cut the battery insert opening on the heli before I did it. After I did it once, second time is easy. My LHS sales is very helpful. After I broke a part, I went to LHS to buy the replacement. The sales always tell me how to install it if I ask for help. I saw the sales help the customer to install part and adjust the plane or heli everytime. They did test fly too.

As XRB, the only thing will break is the blade. Just do not drop it over 6 feet!!!.