There were VERY few people who were pleased with the 07' strings. However, there were a few good sets. I've workeed on plenty of the 07's to know that the good sets were few and far between. I had to replace the ones on my Vectrix XL. I would be willing to be your bow is out of time as we speak and you just don't know it. I was retiming mine every 100 shots even after about 500 shots had been put through the bow. I'd replace them.