I was hoping someone would point this out but since nobody did...
Adjusting the brake pedal down: Please wait until you know about brake fade
before you throw away that "extra" brake pedal travel. Personally I don't believe an SC or Carrera has enough "extra" to make this a wise modification. I've adjusted the pedal on my Carrera after I upgraded to bigger brakes but I waited until I had really stressed the brakes (multiple drivers running back to back at multiple tracks) and was positive that they wouldn't fade enough to be effected by the adjustment.
Adjusting the gas pedal up: Lengthening the rod at the gas pedal is fine as long as you shorten the linkage at the other (engine) end. If you don't do this you may bend your linkage. Bend it enough and your throttle won't completely close after it is bent.
I'm tellin' ya, if
I'm the voice of reason here, we're in trouble.
-Chris