John (Jolm?) Dubroff dulcimer
Instruments- discuss specific features, luthiers, instrument problems & questions
If this helps, here is an example of fine tuning beads used on a mountain dulcimer, a Keith Young built model (the instrument leaned against the back of the bench):

In addition to friends who shared audio or video here, there was more participation on Facebook than I might've imagined. The spread of the love of the Appalachian dulcimer around the world is, truly, a beautiful thing.
(me with my noter)
When I'm playing by myself, I like to be in tune with myself or it can drive me a little crazy.