Spud posted up this link some time ago and I think that it is a pearler. It lets you print out templates to cut and join two pipes (of any diameter) together at different angles. Very handy when you are joining a lyne arm to a column.
I had to go looking for it this arvo and thought that it might be of more use in here.
http://www.harderwoods.com/pipetemplate.php
Many thanks for sharing that one with us Spud.
Cheers, Heffers