Limbow, I keep mine around 71/4 to 71/2" and I have both B-50 and a Ts -plus string...I make my own and padd my loops with a little B-50 mixed in the loops...To answer your question I do believe all of John's bows are set up for Fast Flight...P.M me if you want to know more...I have a 62" Autumn Storm all Osage with a Crown Jewel inlay through the riser and 50#@28"...One of my favorite bows that I traded for from TwoTimer "Robert Painter" a few years back...Great Bow and Very good glue lines and workmanship...Call John himself and he will really give you a lesson on everything you need to know about his bows...God Bless, Keefer's <")))><