I have these blocks installed in all of my floyd rose equipped guitars that don't have a recessed tremolo route on the body. In a lot of cases (but not all!) the guitar gets setup with a dive-only way of operating the floyd after installing this block.I Therefore I have them on all my EvH guitars as well as my charvel Danhage and Demartini models. Makes these guitars even more stable and resonant along with more fatness and sustain. For this price a nobrainer. If you're handy, you can do this yourself; just loosen the strings, unlock all saddles, remove the strings and saddles all together for the b, g and a string. The other saddles have to be loose and off the baseplate but not to the extend that you have to remove the string and it's stringlock-screw like with the former 3. Unscrew the 3 screws on the bridgeplate and you can detach the old sustain block and exchange it with the fat brass one. Then you can install the saddles and strings again and intonate the guitar. All in all it should be done within an hour....you won't regret it!