I still maintain that the Autoharp as we know it today is really a left handed instrument. Lefties, turn it over and try it upside down! More room to play, no crossing over.
bbc, Ivan Stiles, an Autoharpist of some note uses a harness to hold his harps up. Less strain everywhere. Look in the AutoHarp Quarterly.
Try to hold it so as to eliminate a cramped wrist. CTS will wreck your day.