Stik at it Chamber66, the way Musky described is the standard trusted method ,If you get the old fork nut just clear of tight ,so you could move the washer ,lots of easing oil and a solid bang from a heavy hammer will free it ( I do remember a post about a year ago of a very awkward one but eventually the guy got it done )and I've never damaged a fork leg . The old nut later should be kept and modified to make your own special fork replacement tool using a length of stud iron washers and nuts and for any future fork work. Mine sits fitted to a rafter awaiting it's next use, Best of luck BobH