My wife's Trykon Sport is labeled with 40-50 lbs limbs but the bow max's out at 35 lbs. I've tightened the bolts all the way but the limbs aren't any where close to being 40-50. My little brother has the same bow marked 30-40 and his is dead on at 40lbs & his bolt's are tightened all the way. What's the deal with my wife's bow? Please help.