List I should first explain that this flute is entirely experimental.
Most flutes are capable of achieving more than one octave by over blowing.
My flutes tend to cover about 1 and octaves. There could be other reasons for this problem, but regardless, I have been very satisfied with my flutes even though they are not technically perfect. After that you get into diameters that are unreasonably large for flutes. I provided the finger hole diameters and length for those of you without the means to tune, but almost anyone can tune the finger holes close enough once the embouchure and tuning cork is done. So, La, Te, Do, then you know the diatonic scale and can tune this flute.