I'm shopping for a used A/E fretless and some of them I've found are unlined. I don't really use the dark fretlines of my old defretted electric, but I do look at the side of the neck where the frets used to be to orient myself (particularly at the start of a tune, or during a big jump). I asked a local repair shop about getting dots installed at the fret points and they recommended that I do it my self using a chromatic tuner and paint. Has anybody had this done or done it themselves? Any thoughts?