I've used Soundsmith, VAS and Joseph Long in the past. Long did the retip on my Dynavector XV-1s last May and I am very satisfied with the result. Dynvector does not retip but will rebuild which involves going through their US distributor and back to Jp. About 1/2 the price of buying new for the rebuild. I'm in the NE of the US so VAS or Long would be my choices for a retip. Their customer interaction in my experience is better than Soundsmith and I've made the trip in person to Soundsmith.