Now that we have CF bikes in the corral need some help. My speciazed roubaix specs decal came off seat tube. Just bought my wife a trek 4.5 wsd with no decals and my soon to be 12 yr old son has a trek 5 series wsd that is all carbon. Im a nervous nelly when it cmes to tighening things up. Ive done some research but finding general ranges. Seat post? CF stem to CF bars and CF fork? My son growing and know adjustments will be frequent this year.