Well a CE 90 has a .531 spine so a close Easton/Beman would be a 500(.500 spine),a CE 150 has a spine of .487 so a Easton/Beman 500 would be close also depending on length how much weight up front,a CE 250 has a spine of .373 so a 400(.400 spine) these would be close but may tune alittle different.Ad's are good shafts also,an AD Trad Lite says it spines at .350 and the Trads spine at .300.But I find these spec's don't compare to parallel carbons.I mean the Trads spine at .300 and they are not as stiff as my Axis 300's(.300 spine).AD's are a tapered carbon which seems to help them work for alot of bows.