I also fix dulcimers, If you have an old dulcimer I can bring it back to good playing order with a very reasonable service charge.
I also do minor adjustments for your dulcimer:
Change strings, $2 per string
Add strap buttons to your dulcimer, $2 per button
Dulcimer setup (action adjustment, new nut, new bridge, fret filing) $25 for each service or $70 for full setup service.
Adding Extra Frets: $40 per fret