To make my Tenor Stagi concertina much easier to play, today I did a thumb strap modification - mounting the thumb strap on one screw, not three - so the strap now swivels comfortably when my hand twists up or down to reach the far notes.
I'm loading the video onto YouTube - it will be at...
Bruce (Tomo) Thomson20
Lyndhurst St. Chelwood Village,
Palmerston North06 357 7773
021 176 9711 palmytomo@gmail.com