I had a 10 strand Ultra-Cam on my 60"Centaur. I had a terrible time getting arrows to fly straight that my 62" Centaur shot perfect. There was only a pound of difference between them,and they were both built the same way. I put a D-97 14 strand on the 60"er,and it is dead on. I had dramatic right arrow flight with the Ultra-cam,but with the D-97 it shot the arrows perfect. What's wierd,is the 62" has the 10 strand Ultra-cam string and I never had an issue with that bow. So needless to say,it took a while for me to finally try a string swap. rat'