I have one of those the we use in conjuction with jack stands to level our baja bug during the build, we need it to be perfectly level while we built the roll cage and can use a digital level off the tube when everything is level front to back and side to side. I have the 30 in lift ones I was going to use for the trailer. also made this for a quick lift bout a couple of these air bags for 25 dollars. and when removed from the stand I can use the bottom to roll the car around.
http://i890.photobucket.com/albums/a...-28-25_317.jpg