Well, I broke down and spent the $$ for the JET AFS-1000B / 708620B Air Filtration System. It arrived from Amazon in just 3 days and was well packaged.
On testing, however, I noticed that the fan blades are horribly off-balance. The result is more wobble in the unit than I expect it necessary.
Have others observed this? Can it be adjusted? Is it defective?