No Miriam and Nancy I have not turned my 319 into a HC and I have decided I like to treadle the machine much better. So will not HC but I have an extra handwheel and try to convert it to HC to experiment for Miriam. I will not leave it as a HC but will play with it. I have no problem controlling the 319 in treadle and the stitches come out fine. I vote for treadle unless you have serious problems in treadleing a machine.LOL