I had actually done some work to fix the fretboard as well. I had brought the fretboard beck to Washington this past September when I went for a visit.
Looking through a jewelers loop, we can see that the filler is pitting and has a lot of "white" in it.
The inlays for frets 17, 19, and 21 need to come out and be replaced. This thing is as sharp as a razor's edge.
One out, two to go. Pocket is a tad to shallow as well. I will deepen the pockets for the 3 inlays, before setting the new ones.
Knife is pointing to a bit of a high spot that was contributing to the thin inlays.
Who says CA (super glue) is forever! Super solvent for a super glue.
Fretboard may looked warped and is, but a minor thing. The stress of the grain and sudden switch from a very humid environment, to a dry one is to blame. The fret grooves contribute as well.
Refilling the gaps around the inlays that will remain in the fretboard.
Needs a bit more work, but will be just fine in the end.
Another inlay partially filled.
This is from the first inlay (3rd fret). Much better than before. It'll need one more coat and sanding, but will look great.
As the filler seeps into the gaps and shrinks from the water evaporating, a nice valley is left. This started as a "hill". Two more applications of filler should level it out.