Hi. I use a guy named Mark Balash. He is very good. Highly recommended, has worked on lots of top players in Detroit areas instruments. He has worked on my Essence 5's, and many other basses whenever needed. He knows the Alembics well. Tell him Tom H. referred you. He is at Berkley Music in Berkley Mi. (Detroit area) 3039 W.12 Mile Rd. Berkley Mi. 248-543-3900