i can count with my hands who has CF, and they don't comment, so don't make any judgement yet. plus stock's worse than the 1 pc, the worn center bearing created 10 times vib. if any from my alum :) plus the price diff and easy resourse and good service with the alum ds, i'd say we have a winner :) plus you can always buy both, try both, return the one you don't like