i agree with them, get a 2 speed transmision,engine,etc.... but i would get an engine first. i have a hpi nitro rush with a .15fe and i thought that this motor was fast until i just got my rc10gt yesterday and wow that ae .15 will run rings around the .15fe
the .15fe are junk power wise anyways but mine is really dependable and starts up on the first or second pull everytime.
don't get me wrong i like my rush but i'm probablly going to upgrade the engine with a fantom .15 since everyone in this forum says nothing but good things about them.