It took 15 minutes to install, but about 3 hours of playing with it, essentially to satisfy myself that it was optimized. I am amazed at the difference this simple modification makes. I am not one to exaggerate, but here I go. The bass is better, tighter, better defined. The delineation of the musicians is greater, sharper focus, better illusion of front to back on live recordings. I listen to a lot of acoustic jazz, prefer live recordings. The dual pivot makes the acoustics where the recording was made more apparent. It is like the difference between my Ortofon 2M Black and my Per Windfeld. I am just stunned that such a simple thing can make this much difference and have no explanation for it.