It sounds like a lot of unnecessary work to saw fret slots and then fill them with wood to get fretlines to a fretless bass. And take the change that the lines pop out. I'd like the fretlines to be quite subtle. No maple lines on ebony board, please. Has anyone tried any shortcuts? Like just drawing the lines with a pencil or some kind of marker? Am I just lazy? What about sawing very shallow fretlines and use epoxy to fill them?