Marked out one of the fretboards for the Mother of Pearl markers. Here's what I did:
Stuck a bit of masking tape over each fret gap to be inlayed. Marked the centre line of the board, marked the centre line of each fret gap. Marked the fret number on each inlay and the centre lines of each. Stuck masking tape to the bottom of each inlay and cut off the waste with a scalpel. Marked the position with a pencil of each inlay on the fretboard. Put a blob of superglue on the masking tape and put the inlay masking tape down on the fretboard and squared it off with a set square. Marked the fretboard with a scalpel very carefully. Peeled off the masking tape, the inlay and removed the masking tape from the bottom and put them carefully to one side.
Due to a muck up ordering the Mother of Pearl inlays I'm still short a set so I can't proceed with the Rosewood board until they come but I did a bit of routing on the Ebony one.
For my inlays I routed close to the line and then pared to the line with a sharp chisel, apart from one little bit shown below where I made a slight wonder over the line with the router. My excuse is there was too much dust around the cutter LOL. After that I put a bit of masking tape on the cutter to blow it away and it never happened again. Chiselling was the first time I really found a difference to real wood, I don't really know how to describe it but paring Ebony, it's a clean forceful sort of cut, the Ebano felt more like paring balsa but harder, that said it cut very cleanly, certainly good enough for me.
Anyway, the inlays fitted a treat with no stress at all other than that one little incident of my own doing. It cut so cleanly I'm thinking I may get away with no real need for edge filling with glue and dust (apart from that one bit shown again with the inlay).
The good news of the day was I got my sander back from being repaired at Festool, the switch broke and it needed a new set of gears but bare in mind it is 25 years old and has had a very hard life and this is it's first repair