This foot just has a little screw that you tighten to have it stay on the shank of the presserfoot. The screw is short enough that it just needs to help make it tight, and isn't intended to go in any holes. I'm thinking that I could attach it, and just use the hand wheel to see if it would work rather than the foot petal and the motor. That way if things didn't line up, I'd know right away. The button holer does the same thing, there is nothing that attaches it to the shank except the little screw, and where it would fasten on is rounded like the shank of the FW. I'm not needing to try the buttonloler as I already have a Singer one.