I've got a 20 gallon ShopVac, which I used the vacuum bags with. With the bags I can run for 100 times longer than using the blue filters and you don't have to clean up the mess inside of the vac, just change out the bag.
I used to do drywall years ago and cleaning up was always a pain. Those blue filters would clog up after about 100 sq ft of floor. The bags would allow me to do almost an entire house before needing replaced, so that's why I'm sold on them.
Nice job on the cyclone Stu, can't wait to see how it turns out.
To a small child, the perfect granddad is unafraid of big dogs and fierce storms but absolutely terrified of the word “boo.” – Robert Brault