Let me explain. I had it in my mind today to buy a Jungle Jack thinking it would make things easier as far as changing blades. My wife and I were at a lawn and garden show and I approached one of the vendors that I was fairly sure was a Jungle Jim's distributor. I asked about the Jungle Jack and the salesman told me he had some of them and needed to move them. He asked me if I was going to be using it on a WB or a ZTR to which I responded both. He cringed nad told me that it had been his experience that the Jungle Jack was not safe for use on a large ZTR. Of course with my wife standing right there to hear that, there was NO way I was going to be buying a Jungle Jack. I do have to say, I'm glad there are dealers out there that will not sell something if they think it is not safe, even if it means they miss a sale on something they need to unload.