Here's a solution I came up with to solve a jack problem. My trailer is too low slung to use any of the standard swivel type caster jacks so I ended up using two different jacks--one on ech side of the tongue. Thought this might be of use to others with the same problem.
http://home.att.net/~daniel.v.jones/tea ... assis.html
If anyone knows of a wheelie jack that can crank down to ten inches, please let me know.