Doug, I received my Centaur from Jim back in Mar/Apr 2010, I shoot 3 under normally and had Jim tiller for that. The bottom limb at the fade is 7 and 11/16 and the top limb is 7 and 13/16 1/8th difference (at my brace ht). Now that being said I played around with it trying to get the best tune for accuracy and quietness and never could get satisfied, I eventually went back to shooting split. The bow is just quieter to "ME" shooting that style. Jim did exactly what I asked him to do and gave his advice before and after the bow was built (Probably worried him to death on it, good guy!). My personal opinion now after having bows built both ways (BW, BigHorn, and Centaurs) it don't really matter tune using arrows, brace, and noc adjustments and you'll get where you want it, but to me 3 under will be louder to you.