An alternative is a manufactured unit like the fabricated one origianlly
described. Many vendors offer them. This one is from Harbor Freight:
If the link doesn't work, it is Item #45238-1VGA $29.99
I have seen one used and it works very easily on level ground.
I bet your local hardware stores have them or can get one for you.
From: skip <email@example.com>
I've been thinking of one of these:
Gus aka "the firefly"
Extraordinary crimes against the people and the state have to be avenged by
agents extraordinary. Two such people are John Steed, top professional, and his
partner, Emma Peel, talented amateur. Otherwise known as The Avengers...