Bryan Cather writes that he has a sustain hole but no automatic sustain.
I have the same situation on my Hardman Duo.

As for the 65-note rolls I had for sale, seems like the third time was
the charm.  Thank to everyone who replied.

I live two blocks from the Red River of the North and have emptied my
shop in preparation for the flood.

Mark Van Essen
East Grand Forks, MN