On Mon, 07 Sep 2009 23:51:12 +0100, John Rumm
wrote:

If you are running a pipe vertically to the hole, you can put a slight
bend in the end of it. So it tips the elbow dwn a bit and gives you the
87 degrees or whatever it is you need.

That's a clever trick; I will remember that in case I need it in the
future. I thought you were meaning a brass elbow that was 87 degrees!