I bought one of these units a few years ago from a store in the UK that was closing down . Now I’ve just bought another. It’s a beautifully engineered piece, very smooth, sounds really good, takes minutes to install, and stays in tune - if you have tuning issues after fitting one of these the problem is elsewhere! I was going to try a different block material but the Sustainium on my first one sounds so good I didn’t risk it. I’ve tried lots of other brands over the years - Floyd, Kahler. Schaller etc… these are the best.
