You guys are right about the first blue canister having the older style wands, the Epic 6000. Yes, you could take the hose from the newer style wands (epic 6500, lux 7000, legacy etc) and use it in an older machine. But, But, the later model newer style wands, and even the hoses for the older style wands, now have a v shaped notch cut in the machine end. If you take an older style braided hose, it will not fit in the newer units (although they make look identical) because of this notch. Why the notch, I don't know, I think it might be because of a polarity issue. If you look at all the later model units, the power cord is polarized, whereas the older units weren't. Just a thought.