Welcome to the forum dfp,
As AxlMyk has said an engraver or a CNC router would give you the best resaults. Now you could do it free hand but I do not advise this method as the wood and router has a mind of there own.
harrysin, on this form is an advocate of jigs and templates for routers he may be able to give some better idea of jigs for this.
Just curious, your engraver, what type and does it work well. My son and I are in the process of building a CNC router, and this subject interests me.
Cleaning my glasses will not make me look any better, but will make what I'm looking at better!
Nova Scotia, Canada. A combination of beauty and history.