I was reading an article about fret leveling, and the author was pointing out the differences in technique for single radius vs. compound radius. This quote made me wonder if I missed something in the training I received from some notable repair folks: "On a single radius fingerboard, we’re trying to keep that radius consistent. To do this, we have to keep our levelling beam parallel to the neck’s centreline. That means that, at times, the levelling beam ‘overhangs’ into thin air (see image below)." Source: https://hazeguitars.com/blog/compound-radius-setup (see the Fretwork Differences for Compound Radius section) I've never seen anyone use a leveling beam this way. Is this the way you are supposed to level frets on single radius fingerboard?