I just got done measuring the string heighth of my bass and it's about 15 mm high. What is the standard heighth of a bass being used for walking jazz lines? I know this is way too high and I need some advice on how to lower it cuz my fingers are dyin! The strings are metal and there is a bevel or ridge on the fingerboard and I dont really know how big it is because i have nothing really to compare it to. Any feedback would be great!