Everyone at my old knitting group said I was just a weakling, but I'll ask anyway--how much can you stand to knit on a knitting machine?
When my son was small, I bought a Singer...forget the model, it's up in the attic because when he was little he grabbed at it all the time. Anyhow, it had to be bolted to a heavy coffee table and I hadf to hold the table steady with my knees and shove the carriage across with all the strength in my upper body. It was supposed to handle any gauge of yarn, but it wasn't possible to move the carriage with anything heavier than baby weight and the yarn had to be smooth. The company said it wasn't defective and that I just needed to get used to it. My husband tried it one evening and HE could barely get it to move. I found it so tiring that I have never really tried to use it again. Are they all like that?