If the one you built in the first place works for what you do, why mess with it. If you more power, get a little bit bigger ram, but then you will need a stronger frame. The presses with bottle jacks work fine, but they are slow, especially when you get into a 20 ton jack. Our 100 ton press has 3 speeds, either air over hydraulic or manual pumping. Several years ago we built an oil filter crusher out of a pump similar to what you have. We crushed a filter with our hydraulic press to figure out how many tons it took to crush a filter and then bought a ram with the proper diameter and stroke. It works like the new $2000 kind with only a $200 ram out of pocket.
