I too, have a disability. (Cerebral Palsy) and sew in a similar way. I am saving up for a machine with a stop/start button but I got to thinking the other day that maybe there is a way to mount the pedal to the chair back or table so I could just lean into it (by sitting back or forward.) I'm not sure it works. It came to me last night while I was sleeping. I will keep you posted.