Yes, I actually remember the 8 sweep Octopus with double tubs. Frankie McCloud had one that he set up in numerous spots in Virginia with "Old Dominiona Amusements" back in the 70's. I can not say I have seen one since, but I remember this was just like the old octopus with a single tub, whereas the sweeps were straight. It was almost as if it was the same ride with the same center, they just added a straight piece at the end of each sweep to accomodate two tubs instead of one. I was just a kid then, so I am not sure if that is how this was done.