Thanks, Smitty - the dealer swapped the one they sold me for the strap wrench. Its still pretty cramped under there, and the filter was on pretty tight, but I eventually got it.
I cant remember if I read it on this forum, but whoever suggested cutting off the end of a 1 liter bottle to slip over the filter once its able to be hand loosened, and twisting the filter off with it on there, that was a great idea, saved a lot of oil spillage.