John Mason in Glendale California is a superb French Horn technician and horn player. I trusted him to rebuild the valves on my cherished Kruspe. He did a superb job. He can fix just about anything.
Harry Siverly and crew at The Horn Shop do an outstanding job. I’ve trusted them with many of my horns. When I showed them a Briz 2000N they were very impressed with the quality. If you want to contact them I’d suggest calling. They are pretty busy and often are not very prompt with email replies.
4337 N. Golden State Blvd Fresno California, 93722-3801