I have an older eternity ring I inherited. Most of the prongs on the ring are worn down and need to be re-tipped. A local jeweler offered to re-tip the prongs but I have never worked with him with anything other than minor repairs and I want to make certain I will be happy with the outcome. I'm really unfamiliar with re-tipping and was wondering if it is the kind of repair that requires a really skilled bench. Thanks.