I used a series of small sockets and washers and the end bolt to extract mine out of my 603. It took a little while to get them out, but they came out. I have heard of a special tool specific for this task, but I didn't want to wait around for one, so I just had at it, and got the job done! It can be done, and as the old adage goes, "where there's a will, there's a way"