wow! i found some pics that show how a guy made his own press style juicer that mimics the norwalk only for about $100 for the press and then using a champion juicer as the grinder. compare that to a norwalk which costs about $2,300.
here are the first two pages showing the basic design.
Automotive tools are for the garage not food prep. its an issue of sanitation.The jack should at least be under the food prep area and enclosed to prevent contamination.