There are two sizes of slot in the top clamp pressure feet so you need to make sure you get the right feet for the machine. There is a top clamp straight stitch pressure foot used on a Reversew or EXP B. T. machine that is rounded
up on the front and back. If you filed the left and right sides a little you might be able to use this one for free motion.
If you are going to use this machine a lot for free motion I would just unscrew and remove the feed dogs. doesn't
take much.