I had this bridge installed by my luthier on my Sire V5 and he said that none of the original holes fit, he had to drill new ones. Furthermore, when it's installed aligned with the string-through-body holes, the saddles are misaligned with the neck (the 5 strings get uncentered, slightly to the right). I'm having mine reinstalled and putting the strings through the bridge instead of through the body to correct this. Also, if using this aligned with the string-through-body holes, the saddle intonation screws have to be cut because they are too long and the neck socket of the bass needs to be adjusted because otherwise the neck sits too high relative to the bridge. It's pretty much the opposite of a direct replacement for a Sire V5 in every aspect.
It's very sturdy and sounds good, though, but I can't say it makes a lot of a difference from the stock bridge.