If you like to dry leaves and flowers for their preservation, I suggest you build this press.
Perhaps, it can also be useful for other tasks.
The pieces are designed to fit solidly and have no looseness. You may need to remove the burrs caused by the elephant's foot effect.
Threaded parts can be printed with 0.2mm layer height to save printing time, but run smoother with 0.15mm.
To press flowers you will see that it is not necessary to tighten the screw with force, look for the right pressure and do not break the press.
I haven't tested it, but I think the model could be scaled to 120% without losing functionality.
Assembly:
Template for the pieces of cardboard and blotting paper:
The author marked this model as their own original creation.