are you sure u werent just burning out the motor?? lol im pretty sure xmods cant do it, but if you claim to have done this... i suggest you get some sort of video or pictures of this happening, because as it stands, barely n e on in here believes u.. sorry
.. also, if you were to have smoke it would have to have been outside or something because doing that on a smooth surface liek tile or something wouldnt produce that effect.. because i have ran my nitro r/c car in the street and when it loses control u see a little ammount of smoke fromt he tires.. but in my garage (smooth cement) i see no smoke ( not even doing donuts). so please get some visual evidence so that we can believe