i need to correct myself on the weight issue. yea, they're ballpark the same, but there's a letter weight designation for each rotor.

does anyone know if the letter/weight code is the same for s5's and cosmo's/20b's, rew's?

I can't remember how it goes but it's somethlng like if two rotors have letters that are next to one and other in the alphabet (like J and K) then they can be used together. I "had" one third gen rotor and one Cosmo rotor in my motor before the rebuild by CLR. Maybe someone else can chime in with a definite response.

i've only mixed a set once...that was before i knew about the weight code =/

anyhoo, that motor is still running to this day, so it can't be all THAT dramatic, as long as it doesn't spin very fast...6500-7kish?

but with a 20b, might as well have the whole shit balanced just to be anal.

My Buddy Has A 20b For Sale With Roughly 45-50km On The Motor If Intrested Pm Me With Offer And I Will Get In Touch With Him He Lives Here In Alabama And Was Going To Do A Fd Swap But Did Not Get To It.

^ pm me with a price