I do not suggest to buy these china car, looks cheap but very easy to break ( all parts ).
I bought one and play for just two times and the servo gear breaks, then go to buy the same servo but the servo is not standard size, I bought a TowerPro as replacement and install, then the servo saver's gear do not match....
It looks like cherap but just play two times and cannot play. Actually MUCH MORE expensive than AE !!
Yes I have the same problem, just two pack battery then the servo gear breaks. I bought a MGT micro servo but the size not fit, also the servo horn gear do not fit the server, so no use now la!