After 5 months of physiotherapy I have progressed to the state where I can play my stick dulcimer using my index and middle fingers.  I'm told that I'll be able to use the ring finger as well in a few more months.  I can, of course, use this in my sales chat - 'Anyone can play the SD with just one finger!'.

Sorry for the graphic images but if they discourage someone else from repeating my stupidity then they'll be worth it.  I've started back into instrument making, if somewhat slowly, but I'm definitely following all safety procedures from now on.