Proceed at you own risk, this is not something that is approved by anyone as a safe to use device. Parts that are used to make this are only that, parts and we're not designed for this kind of project.  For those that don't want to spend thousands on expensive units and don't quite trust china special sold at many places, you can make your own out of bottle jack. I've also tossed the idea of buying hydraulic cylinder type pump made for body work. It already has a hose that would be easy to