i jus installed a used(6 weeks) clutchnet disc and ACT HD PP with less than 6k on it. The person i bought it from broke it in before taking it out. my question is, do i still have to break in this new setup? i also kept my old throw out bearing which was new when i installed my PP. now its making alot of noise. should i have replaced it and what happens if the TOB goes bad or already is?