This invention is a device for transporting, holding and feeding a plurality of spools of level-wound or cross-wound thread on a home sewing andor embroidery machine. The seal has two horizontal ribs which constrain the thin-wall column from unstable buckling to thereby reduce or eliminate the tendency of the sealing dams to become inclined to sealing flange surfaces. As a result significant cost advantages are provided in the use of a business rules engine. In another embodiment, each segment is driven by a selection circuit. A virtual file system on the client computer may be created using the set of data blocks and the reference files to point to which data blocks contain the data for specific files.