Ok, this happened to me. I had two sets of the newer FF limbs, both made in 2001. Both sets are exactly 65#'s. I hunt hard and shoot almost every day. The top limb on my hunting set starting separating so I took that set off and put on the spare set I have. I hunted with the spare set last year and have been shooting them just about every day. Saturday, while at full draw the string popped and the limbs came forward so hard that the top limb on that set broke, beyond repair. So now I'm left with two bottom limbs. I put one of the bottom limbs in the top socket of my handle, (after taking out the locator screw), and the bow is shooting the same, no tillering no nothing. It's shooting just as quiet, fast and accurate. How could that be? What's going on here. Did I just get lucky?