I bit the bullet today and cracked on with servicing the Copen. The bank holiday weather struck first thing, so I lashed up a cover to keep me dry I then discovered a few things that may help others to change the oil filter. 1) Do not even attempt to change the filter without the special tool, it just can't be done. 2) have small hands, or get a child to put the tool in place and for removal and installation of the filter. 3) make sure the filter is the 55mm deep one otherwise you'll never get the new filter on. I also found a helpful image on the oil filter box which shows how to get the filter on and through the space I hope the next 3k miles don't go too quick!!