My cyclone is 30¡± x 30¡± in plan, plus the big filter. That is larger than the Supercell, but it sure works well.
I set it up with the filter close to the wall to keep it out of the way, but that was a mistake. I cannot blow down the filter on that side.
The filter is remarkably efficient. I have a ceiling-mounted air cleaner, but very rarely use it now that I have the Oneida. I still use a dust mask.
The cyclone was expensive. What surprised me was how much I spent on ducts, fittings, blast gates, and such. It was easily as much as the cost of the cyclone.

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John Hinman
Boise ID
K700S and A941