First of all, the guitar you're putting this fretboard on must also have a 24 1/4" scale. Assuming that is the case, the easiest way is to lay a 36" scale on the strings with 0" at the nut and 24 1/4" at the bridge (it's actually easier with 1" and 25 1/4").
Now lay the fretboard on the strings such that the 12th fret matches the halfway point of 12 1/8" (or 13 1/8" if you started at 1"). Eyeball how much the fretboard length exceeds the nut and cut off that amount.
Having a little gap between the end of the fretboard and the nut won't hurt anything and will hardly be noticable.
Also be aware that on some guitars the neck goes into a cutout in the nut roller, so the fretboard can actually be longer in those cases.
In either case, use the scale again when attaching the fretboard, to be sure that the 12th fret is in the right spot. ![](http://steelguitarforum.com/smile.gif)
[This message was edited by Jim Smith on 04 February 2003 at 01:10 PM.]