My wife was at a music store in the city and knowing my appreciation of a handmade guitar took a picture of this fine example. Sorry but I can't give credit to the maker. Don't know who that was. But the image of the wonky fret board has stuck with me. So I eyeballed and sketched and came up with this. Center scale is 25.5", treble E is 24 5/8" and bass E is 26 3/8". Center of the "fan" is the 5th fret. Radius of the arc at the 5th is 29". I'm sure my junior high geometry teacher would have a field day explaining the outcome of my doodling invoking Pythagoras, etc. Thoughts or suggestions from any one who has contemplated or tried this?