The machine on ebay will treadle like it is. The wheel it comes with has a notch in it for the belt. The smaller hand wheel from a 401a will not fit that machine so it has the correct hand wheel on it now. We removed the motor from the 401g, put a washer inside to give the belt more space and put the belt on snug. It treadles. Some people file out more belt room on the machine and on the wheel. I couldn't bring myself to do that. As rare as those machines are I would want that much for mine, too.