I have a used Boulder Creek acoustic bass guitar (5 string). It is a big tank, but it has a huge sound. 2 Problems. First, the action is too high. Second, the frets are very tall, so that when I have the action lowered, I will definitely need to have them sanded down. Would it make sense to have them sanded way down, almost like a fretless? I have chrome flats on the bass, and I wish it was a lined fretless anyway. What are the prose, cons, and hazards of fiddling with the frets?