You can easily just have someone watch you draw your bow and make sure that upper and lower cams are both hitting the stopsat full draw at the same time. This will tell you if your bow is timed properly and if not the pro shop can adjust for you if you don't have a bowpress by making a twist or two in your string. I don't own a bow press and have my dealer take care of it. If you need a new string thoughI have used a winners choice stringand have been impressed with it. There is a guy named Gibblet( I believe that is his name; correct me if I am wrong please)on here that makes and sells strings and everybody raves about him.