medium jumbos down to .021" time for a refret?

could i squeeze another level out of this ?
some frets have got furrows as well
measured fret hieght over most of the board and the low spots [not inc furrows] are at the .021" mark

how low can you really go with a levelling job??

I was able to just barely dress out frets that are about that low. If I wasn't getting the guitar ready for sale and it wasn't vintage, I would have refretted it.

Those frets are probably less than half as tall as they were when new. It's time for new ones unless there's a really good reason not to refret.