I've just recently started doing my own fretwork, and I have a couple of questions. After I level the frets, I run a black marker over the fret tops so I can see how much material I take off when crowning. I stop when there is a thin line left on top of the frets.
How thin of a line should I leave? I usually stop when I have a little under 1/64 of an inch showing (the contact area of fret that touches the string). Is this too little or too much?
I also noticed, that it's possible to remove more material from one side of the fret than the other if you're not careful, making the black line not perfectly center on the fret. Would such a small deviation cause intonation problems?
And lastly, how many times can this procedure be done before the frets need to be replaced? How do you know if your frets are too low?
Thanks for all the insight.