I have just started playing Fretless, I have read about the nightmares of adjusting, I am actually doing better than I thought as far as intonation, but you either are "in tune or you are not" so I still have a ways to go. My question to you fretless players.... 1: I have read one way to improve on this instrument is to play in the dark. I have no problem with that, but I am curious if anyone here actually does this, and is this a proven method, or just some persons idea of what works for them. it seems to me if this is a proven method, why even have Fretless basses with lines or side dots? please advise...... btw, now I am loving the fretless so much, I am actually thinking about getting another one, I have a Warwick standard 6er.