Wow....I just tried two different sustain blocks in my Floyd Rose equipped guitar. I changed the Floyd's original block to a tungsten carbide block: https://floydrose.com/collections/upgrades/products/frotub Yeah, it's not cheap at $124! But I wanted to get the most expensive one....cause I deserve it! (hey you should see my frivolous 1/4" Neutrik guitar plug encrusted with Swarovski crystals lol) But anyway, I did notice a bit more sustain than the original block but the tone shifted into a warmer, darker spectrum. Then I changed the block to a fat L shaped brass block: https://floydrose.com/collections/upgrades/products/froftbl?variant=29837560786 Great Googly Moogly!!!! The guitar just came ALIVE. Spanky as hell. The High E and B strings ringing out LOUD. I just didn't expect THAT much of a difference.