My father built this dulcimer for my wife about 50 years ago. She never picked it up or tried to use it. He was a very skilled craftsman and woodworker if not much of a father. (but that's a story for another time and place) I once was told the frets were incorrect but I never fretted over it. (I made a punny ) Now that she is gone I'm getting rid of 'stuff' in the house and decided to sell this. I took it to a dulcimer expert that has a shop about 50 miles from me. He said the rear fret is too high and the front (below the sound holes) is too low. So, I'm going to lower the rear and make the front one high. He said to use a hard wood. I'll be using some Osage Orange that has been in dry storage for about 20 years. Here is where I'm looking for advice. The frets look like they are made from something like a rose wood. I believe I'll chisel down the top one but doing that to the lower might be problematic. Would it be OK to just glue a piece of wood on top to raise it? No chiseling here until I hear back from the musical jury here. Wat say ye?