I built my own version of the Sealey MR1 pictured above. It's fine but a bit of a paint to store as the two long ramps a 'kin heavy (I went heavier on the steel as I can't form the ribs they use). Doing it over again I'd make the platform in Gaz1s post above, I'm assuming the platform is in sections (if not I would). That would make it relatively easy to stack it in a corner and also leave the wheels supported whilst pulling the sections under the sills away to get in and out. I'd also look at some way of bracing a winch at the front end to pull the vehicle up onto it as driving cars up on to stuff like this just gives me the willies every time.
I also have some platforms that are just wide enough and tall enough to span (bridge) a low entry 3 ton trolley jack. Jack car up, shove platform under wheel, let car down. If you now want it higher you jack the platform up and shove a couple of short lengths of sleeper under the sides. I keep meaning to make another pair so that I can get a car high and level rather than just lifting one side or end.
As for speculation - I've wondered in the past about re-purposing the mast of a forklift into a single post lift.................
I also have some platforms that are just wide enough and tall enough to span (bridge) a low entry 3 ton trolley jack. Jack car up, shove platform under wheel, let car down. If you now want it higher you jack the platform up and shove a couple of short lengths of sleeper under the sides. I keep meaning to make another pair so that I can get a car high and level rather than just lifting one side or end.
As for speculation - I've wondered in the past about re-purposing the mast of a forklift into a single post lift.................