I did a search and didn't find this article anywhere so thought I'd post it for the benefit of others. If It's not appropriate please feel free to remove.

I used this method myself and found it so much easier and more accurate than the 45deg paper method.

http://www.northlight-images.co.uk/a...djustment.html

It's suitable for all camera with a microadjustment.
I hope it helps some.
CHeers