Yeah, roughly about 2.5mm or so, it's definitely lower than it was when I first got the guitar, have you checked out the demo clip I posted?, that was before I replaced the original bridge, the new bridge got rid of most of the sitar-buzzing on the high E-String, there's still a little bit of sitar-buzzing (first fret action is fine so it's definitely the original nut that's at fault) but I reckon the new Tusq XL nut should cure it completely.