After 25 years my old 25 ton press needs a rebuild It has an adjustable screw ram that i like a lot better than the HF ones with a fixed ram. If you have an old junk jack with an adjustable ram I would take it apart and have it mounted, well braced to the moving shoe. it handy to be able to hold the part and adjust the ram by twisting , instead of having to pump the jack handle. most jacks won't work upside down. a few will work sideways.