It sure would be worth a try to put a Singer 66 spoked wheel on it. I think a hand crank might fit, too. I don't think you have to do anything for a belt guard. It appears to be built in and spaced ok. I don't know if the spoked wheels will interchange on the Japanese machines. I suspect it would. One I had did work. (I have a New Home does not interchange with Singer hand wheels. grrr. )