I have used nylon tie-wraps for a number of 2 and 3 stringer CBGs, and it works fairly well. I like tie-wraps because you don't have to commit to a fixed fret location... you can "tune" them by incrementally moving them up or down the neck and plucking the string while watching your digital tuner. The thing I don't like about them is that they mute the strings some what, and I suspect this muting problem will also exist for the mono-filament fishing-line fretting method described earlier in this thread.

Other advantages if tie-wraps:

1.) If you make a mistake locating a fret, it is simple to fix.

2.) It's easy to change the fretting on your instrument. If you want

     to try the blues scale, or a dyatonic scale, or a chromatic scale, or

     some pentatonic scale, it's a matter of moving, adding or removing

     tie-wraps, and there is no re-working necessary on the neck or fretboard.

3.) You can color code them in a number of ways...

      a.) If you can find 7 different color tie-wraps of the same size, can color code you

           notes on a diatonically fretted neck. You'll need 12 different colors to color code

           a chromatically fretted neck. I think that will be too difficult to find, unless you

           happen to know some key person in the tie-wrap manufacturing industry. (f you

           do, give him our names too.) Pentatonic scales will need just 5 colors.

  b.) With black and white tie wraps, you can color code the major key notes with white,

        and the accidentals in black (like a piano's keyboard). This will help diatonicaly

        "stuck" people make the leap to chromatic scales a bit easier by giving him or her

        "training wheels". Also, playing the black frets (the accidental notes) may be a

        good introduction to pentatonic scales.)

-Rand.

Now that I have looked at the first picture of my previous post a bit closer, I see that it is just a close up photo of the front side of the neck, not the back side. Sorry about that.

-Rand.

Oh, I've seen this idea before on "The Uncle Bob Guitar Project" website. It looks to be an easy way of fretting an instrument, but I haven't personally tried it. Here are a couple photos from the UncleBob site:

Above, the backside of the neck, showing how the fishing-line fret wire is wound to each next fret position.

And here is the front side of the same neck, showing the sound box as well. More details on fretting can be found about half way down the page on this page of their web site. If you have done this before, how well does it work / play?

-Rand.