no I don't do this very often so it's not necessary for me to have a tool to do it but as I recall I just tightened it on there a little bit and once spark plugs are out I didn't have much trouble turning it either way and getting loose... I'm hoping to pull the engine out for the first time in a few years this summer maybe to put some heads on and just look things over. Again I don't think I would go out of my way to buy a special tool for it.. also off the top of my head I can't think of any reason I would need to spin it backwards...
