I'm over killing everything on this build. The press frame itself should hold up to 30-40 tons. I haven't ran any calculations on it but I know 30 at the least. I'm also making it wider and deeper than necessary so if for some odd reason in the future if I want to go to 4x7 or 5x9 I can just by making new plates(no reason to because I'm only providing for myself). The press plates I plan to make will be thicker than average but my theory behind this is that it will provide more of a heat sink and more stable temps during pressing. I will hopefully learn from this and help others. You wont regret what you over build but you will regret what you under build. I do plan to have a set of steel plates to trade out with the aluminum plates and use it as a regular press for bearings and what not when not squishing goo.