I am also very impressed with how everything ran so nice at the track, the modded Quark ran soo cool, and SOO smooth, never cogged, ONCE (I could actually stop half way up the pit lane ramp and go again!

)... the motor ran very strong, more than enough power, and kept it's cool until the end (126F after 30 mins hard racing).
I did have troubles with one of the 4350mah packs, that was when it was shutting down for no reason...?