i just installed my clutch last night in type r, it's a clutchmaster stage three, the install went farely smooth, now when i reversed i noticed that when the clutch starts to grab, the car vibrates pretty bad, but it's not just reverse, but when moving fowards also, but then it goes away as you speed up, it seems only to be when a gear is initially starting, my friend says it's cause the stock itr flywheel is lightened, but i feel something else is wrong, does anyone have any clues what is wrong with the car?