The basic bore is created using traditional French style reamers, turning at the appropriate RPM, and fed into the preparation bore cavity.   The shape of the bore is important to the eventual tonality and depth of sound in the finished instrument.  Now, the tone holes get undercut to product the perfect non-negotiable twelfth.  After the tone holes are completed, the bore is sanded and polished to a smooth finish using a combination of sandpaper and oil, thus creating the most valuable poly-cylindroids, this entire processed is followed by a waxing to ensure the best possible preservation.