I made a large flower press for my wife a few years ago when we were engaged so she could press ferns for our wedding invitations. She enjoyed it and how they came out. The other night we were discussing pressing flowers and how her big press was too big for doing just a flower or two. I decided it would be a fun idea to make a printable flower press. It's pretty basic but it will do the job.

Print the top and bottom plates. Cut two pieces of corrugated cardboard and two pieces of a non glossy paper to fit inside.

Layer: bottom plate ->cardboard -> paper -> flower -> paper -> cardboard -> top plate.

You can add more pieces of paper and cardboard to press more than one flower at a time.

Bind it together with your 4 M3 screws and 4 M3 nuts and tighten it down to help squeeze all the moisture out.

If you want to make any adjustments I attached the openscad file to allow for adjustments. Set the "Top" variable to 1 to create the top plate and 0 to create the bottom.