Customer Video:    • Fret Maestro to the rescue!  

If you watch videos on fret leveling it can look really intimidating.
And it actually is because the tools and rules that have been used for like forever are not designed for doing radius work... and yet frets have the length radius that follows the fretboard radius, and the width radius that is the crown.
NOW there is FretMaestro - so easy that anyone can DIY level radius and crown perfect frets, every fret a clone of the other. And it can also do the hard jobs where having every fret the same height is not ideal, such as making the last number of frets at the heel shorter to compensate for heel lift.
In the case of the customer whose video link is above, he worked around the Dreaded "S" Curve with FretMaestro, something a sanding beam and straight are not suited for.