Hi
Try and avoid getting one of the ones which is a bottle jack with return springs, they are rubbish, get one with a proper ram like the machinemart ones, if your patient you can geta nice sealy one off ebay for the same as a clarke one from mm, I too have had the joy of maxing out my friends press on the a frame bushes, dont know what rating it was but its in a factory that makes factories and its about the size of a small van! gas axe fixed it though
Mike