Check out this commercial unit:

TOP/CAP EZ LIFT HOME

Somebody recently bought one and gave it a good review, although I can't remember on which website it was posted, so can't find more details at the moment.

Every home made one I've seen has had some sort of "one-man operation" issues, including one I made many years ago. My current solution is a forklift and fork extensions same as how the topper guys do it, which works great for installation and removal, but still leaves the storage problem.


Joe