I have a 21# Orbea Oiz with a 2007 100mm Reba Team w/ world cup lower and poploc @ 1600grams w/o poploc. I am looking at a new fork to cut some weight and after being away from Mt Biking a couple of year (health issues) and would like know the difference between my courrent Motion Control and the newer Black box MC and the XX motion Control. My reba is fine for the croos country riding and plan on racing again later this season, how does the 2010-11 sid conpare to the older reba in terms of stiffness? Sid ? new Reba ? or Push rebuild my Reba ?