I still keep a meshed bag handy for the occasional carpet that has large chunks all over it and I don't want to pick up by hand or run through the hand vacuum. Helen and I have found it is a lot easier to take the 2 inch and quickly go around and spot suck the chunks saving the vacuum cleaners belt and motor. Real easy to put contents of white mesh bag while dry into a zip loc and return to homeowner. We have done this a few times with bagies full of lego, small toys and puzzle pieces.
To the new uses of this modified pool filter, please realize there is two different metal filters the one we use is SS Mesh and has the black plastic top ring and bottom cap like in Jims photo's.
The other SS filter is all SS with punched holes. This type only works so-so and restricts your air flow and the knee high plugs real easy.. I still use this one when I do carpets that have been packed with soil.. I have a couple of commercial accounts that the knee high and SS meshed filters will plug with this silt that we break loose during cleaning. Hope this explaines it a little better and is able to help you understand.