afdr9lk writes:

I use mine quite a bit for pressing bearings. I built one
out of scrap metal that does a good job. I needed it in a
burry one day and built it in several hours.

http://www.freakyacres.com/?p=press.php

The 500 gallon lawn roller is interesting...

http://www.freakyacres.com/?p=tanklawnroller.php