He accepted the job and the libility, but based on that, if I was a bowyer I would need to have customers sign a waiver before doing the job. In the current situation, I can't see how the bowyer would need to build him a new bow for nothing, but is likely responsible for discounting a new bow by the amount that was paid for the used bow. Just my opinion. If you are involved in a car accident, insurance covers a portion of the value of the car you were driving, but not the cost of a new vehicle.