It isn't quite as simple as just defretting with an Alembic. I was just having this conversation with another Club Member recently... see, with a fretless bass the point of contact between the string and the wood fingerboard makes a particular sound. Those big pearl ovals don't sound like the wood around them. If you find a bass you just can't live without it isn't an insurmountable challenge. You could ease the inlays out and replace them with wood. That would help. Maybe rosewood or white holly would be hard enough. You still have to address the side markers, which are typically at the intervals between the frets, not at the fret slots. Again, it's do-able... just drill 'em, fill 'em, and move 'em. Don't miss! The best thing to do, (particularly in BeenDown's case) is to have the whole fingerboard replaced and have LED's installed at the same time. I don't know what it costs or how long it takes sooooo...