About a year ago I bought a new DGT model and am having lots of problems with the saddles on the high strings. My local guys are able to fix them every time, but after a while they start creating a sitar/buzzing kind of sound. My techs say it has something to do with the way the saddles wear, and the way the string doesn't make perfect contact with the saddle. Each time they remove the saddle and file it down or sandpaper it or something. But I don't think it's like removing a burr - it's something else. They apparently see this on PRS guitars all the time. It's annoying - I end up taking it in every couple months. Does anyone else have a similar problem and know if there's a video explanation on how to perform this repair myself?