A little knowledge is a dangerous thing, or so they say.
The owner of this guitar fitted a Fender LSR roller nut himself and I have to say showed some skill in cutting the wood away.
Unfortunately he misunderstood how the nut should be fitted and cut away far too much wood.
I tidied the bottom of the hole let in a piece of maple to fill it. I profiled the top of the fillet using a radiused sanding block before gluing then once the glue had dried, accurately cutting the slot for the LSR nut.
The repair was lacquered over using my Clear Satin nitrocellulose lacquer and flatted back smooth.
I did consider replacing the maple up to the first fret to hide the join, but the issue is only cosmetic, the join cannot be felt and to replace more wood than necessary would have increased both risk and cost.
The finished job looks like this. I have used no shims and the action at the first fret is spot on.