I use my Rio screw press to pop out parts with pancake dies and to
impress textures into sheet wax for casting. I got it with the RT
system, but I don't think there are any instructions that came with
the press. You just screw it down to press things. And, of course,
you should not let the press plates get rusted. Oil them with some
light oil once in a while.
Everyone will tell you that you do have to mount it, but I, in fact,
do not have mine bolted down. I screwed down a small strip of wood
to the bench top on one long side of it, and there is another piece
of wood that is the rim of my bench, and the press sits between these
two pieces. It works. I can pick it up and move it easily if I want
more room on my bench. Just try screwing the plates together hard,
and you will see the need to contain the rotation that will
naturally happen. The whole press will want to turn, base and all.
This is the motion that you must control in order to use it.