The hand pump presses aren't built as rugged as the ones with gear pumps. The end plate is like a waffle plate on one side and flat on the other. There is a flat plate that goes over that then washers and nuts to tighten it. It is hard to get it tight enough to withstand the pressure of a real pump. When I got it it had papers with it so I used them. When I bought replacements I found out that there is such a thing as heavy duty papers. I was blowing papers all the time with the light duty papers and haven't blown one since with the heavy duty ones. There were times when I wished that I had sold it and bought a gear pump press. Now that I have it figured out I have a good set up that cost a lot less than the gear pump press.













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