Pictures of the cut-out for my machines
I can't figure out how to send pics in a private message, so I guess everyone gets to see them. The metal brackets are right off an old junky cabinet, and I can easily change out my vintage Singers. The 15-91 can be flipped back so you can drop the feed dogs. The 401a has a longer base than the black ones. They have a little extra space to the right of the machine.