If it's strecthing you want this exercise should do it. If not the best strecthing workout I've found, it certainly seems to be the most intense. Especially after you move it to the realm of the first three or four frets. https://www.justinguitar.com/guitar-lessons/finger-stretching-exercise-te-101 .
Good luck, have fun.
"It takes a lot of devotion and work, or maybe I should say play, because if you love it, that's what it amounts to. I haven't found any shortcuts, and I've been looking for a long time."
-- Chet Atkins
-- Chet Atkins
