I bought an Optima Vacuum Cleaner at a garage sale last weekend. It basically looks like a Filter-Queen, with a few differences in regard to the large metal cone that's over the motor unit of a Filter queen. It has a charcoal filter and a white HEPA filter underneath it. I'm presuming that it uses cones or does it use bags? I paid $25.00 for the vacuum which included all the attachments and powerhead. The reason I'm concerned, is that when I took the motor unit off, there was a paper bag inside instead of a cone--so apparently these machines use bags?