Sometimes I cut the whole tail off with the bone intact and then cut back the hide from the bone, put the bone in the jaws of a workmate, put a loop on some string and get it round the bone tight and whip it off, sometimes once a bit more bone is revealed reset it in the jaws of the workmate for a better grip. Can do this while tail is still on the fox also but no need for a vice.
I skinned out a fox the other week, head to tail, after a week on a rack the fur was falling out, shame as it was the first one id fully done. Anyone got any tips?