I've had a 24" Kromski harp for a few months now and lately it seems every project I do, no matter how evenly I try to beat, my fell line always ends up at an angle, always higher on the right, sometimes by as much as a half inch. I didn't have the stand at first but added it on after a month or so and it seemed this problem started after I got the stand. Does anyone know what might be causing this and how to prevent/fix it?