Just a tip..didn't see it mentioned. When measuring your fret positions, do not move the ruler unless you must, and use as long a rule as possible. If the fret scale calulator is capable of showing the progressive measurements for each fret...ie. 1.3, 2.2, 3.1, etc then use that rather than the distance between each fret. You are asking for multiplied errors that can be significant by the time you get to the final frets if you move the ruler too often or use the fret to fret measurements.