Hi i just got this truck from a hobby shop its a offroad stadium truck not a monster. does anyone have any experiance with these are they any good for racing with some hop up parts or r they good for a bit of a thrash around the track It has a force 15 in it??? also i just started to break in the engine an after putting it through 1/2 a tank i noticed that now when i pull the pull start hard and the engine turns over after the engine has stopped turning over i hear this spooling sound that i didnt hear before im not sure if its the clutch or the pullstart does anyone know wat it is? and im alos noticing a bit of oil seeping out of the drive shaft that goes in to the engine is this normal?