how bad was the twist to start with? i just got strung up for the first time today, and it had very little twist.i was happy to say the least. what i had to do to correct the twist i had, was whichever side of the limb was pointing down( when looking at the end of the limb. with the back of the facing the floor) you file the string groove on the lower side of the limb, and take off limb material on that same side. it worked for me. hope it works for you good luck.
eric