I had some scrap 4x4's laying around, so I bought 6 - 8" carriage bolts with flat washers and nuts, and a $30 trailer jack from HF. I used my wenger adjustable ladder with two nylon straps and a come-along for the front, with my auto jack underneath as a safety backup. Worked perfectly, and it was so easy to roll the rear back. So kudos to whoever came up with the trailer jack originally! Consider this the poor man's version, for those of us without a welder.