I was at a holiday party this weekend and the host - a good friend from work - took me aside to show me his fretless ABG. I love the bass, and I am kind of the "resident guitar nut" at work. The bass doesn't get played much because he has young kids, and I noticed that the phosphor bronze ABG strings on it were gunky and dead. Having owned a fretless before, I also know that rounds chew that rosewood all up. I was thinking of sending along a set of flats with a thank-you card as these will 1) last a lot longer and 2) preserve his nicely-inlaid fretboard. If someone did this for/to you, would you be pissed, though? I don't want this to be like rearranging someone's furniture or messing with something where they have preferences. So that's the first question - would it be an affront to send along a set of flats? If so, question 2: what's a good set for a fretless ABG? I put basic GHS flats on my electrics when I want them, but are there any special concerns for acoustics? I don't want to be cheap, either, but TIs are probably out of the picture. Something basic is probably best.