I've been playing and gigging my Steinberger Spirit XZ-25 pretty much as-is ever since I bought it off of Ebay. Came from FL, was previously owned by a Jamaican dancehall reggae bass player, pretty big time dude. The bass came with some saddle height adjustment screws missing, of which I've replaced all the ones missing and I've set the string height to my liking. Pretty much as low as I can get it without fret buzz. Then I took off the deadest rounds you could ever leave on a bass. Didn't realize how dead they were till I ordered new strings. I installed Status Graphite Hotwire Flats. Ever since I've had the flats on I get a little fret buzz at first fret of the B and E strings. Raise the string height a little, still there. Or it'll be gone for a while and as I continue to pull the strings in tune it returns. I've never messed with a truss rod, but I'm not foreign with fine tune adjustments, just wanted opinions before I messed with it. All else fails I can drop it off as I do have backup basses. I found the guy that owned it on Facebook, and was gonna ask him why he sold it, but it appears he sold it to start playing an XT-25. The bass came with the bridge pickup not working, but I fixed that pretty easily as well, so I'm hoping this isn't the sign of a "major" issue.