Steve Eulberg demonstrates the beginning of a new Lesson Series at DulcimerCrossing.com: Playing Mountain Dulcimer with a Blues Backing Track from the Premium Membership part of the website.
He will demonstrate the Pentatonic Minor Box and how to move it around the fretboard to find the notes that will work for playing Blues in the key of E on an instrument tuned to DAd.
(He also describes this process in his book, Playing Blues on the Mountain Dulcimer, which is available for sale on his website here: OR, Free to his Patrons on Patreon here.)